diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
new file mode 100644
index 0000000..427ab0d
--- /dev/null
+++ b/.github/workflows/publish.yml
@@ -0,0 +1,35 @@
+name: publish package on pypi
+
+on:
+  release:
+    types: [ published ]
+
+jobs:
+  build-and-publish-test:
+    name: Build and publish
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+      - uses: snok/install-poetry@v1.1.6
+      - name: Publish to test-pypi
+        run: |
+          poetry config repositories.test https://test.pypi.org/legacy/
+          poetry config pypi-token.test ${{ secrets.TEST_PYPI_TOKEN }}
+          poetry publish --build --no-interaction --repository test
+  build-and-publish:
+    needs: build-and-publish-test
+    name: Build and publish
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+      - uses: snok/install-poetry@v1.1.6
+      - name: Publish to pypi
+        run: |
+          poetry config pypi-token.pypi ${{ secrets.PYPI_TOKEN }}
+          poetry publish --build --no-interaction
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5432f4d..0a24127 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -32,18 +32,42 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [ "3.6", "3.7", "3.8", "3.9" ]
+        python-version: [ "3.6", "3.7", "3.8", "3.9", ]
         pytest-version: [ "5", "6" ]
     steps:
       - name: Check out repository
         uses: actions/checkout@v2
+
       - name: Set up python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
         with:
           python-version: ${{ matrix.python-version }}
-      - name: Install Pytest ${{ matrix.pytest-version }}
-        run: pip install pytest==${{ matrix.pytest-version }}
+
+      - name: Install poetry
+        uses: snok/install-poetry@v1.1.6
+        with:
+          virtualenvs-in-project: true
+
+      - name: Load cached venv
+        uses: actions/cache@v2
+        id: cache-venv
+        with:
+          path: .venv
+          key: ${{ hashFiles('**/poetry.lock') }}-2
+
+      - name: Install dependencies
+        run: poetry install --no-interaction --no-root
+        if: steps.cache-venv.outputs.cache-hit != 'true'
+
+      - name: Install Pytest
+        run: |
+          source .venv/bin/activate
+          pip install pytest==${{ matrix.pytest-version }}
+
       - name: Install package
-        run: pip install -e .
+        run: poetry install --no-interaction
+
       - name: Run tests
-        run: pytest --verbose --assert=plain
+        run: |
+          source .venv/bin/activate
+          pytest --cov=src --verbose --assert=plain
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index a8768c9..6e52d5b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -30,6 +30,10 @@ repos:
             'flake8-print',
             'flake8-type-checking',
         ]
+  - repo: https://github.com/pycqa/isort
+    rev: 5.8.0
+    hooks:
+      - id: isort
   - repo: https://github.com/pre-commit/mirrors-mypy
     rev: 'v0.812'
     hooks:
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index ba01b55..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,17 +0,0 @@
-language: python
-python:
-- '3.6'
-- '3.7'
-- '3.8'
-install:
-- pip install -e .
-script:
-- pytest
-deploy:
-  provider: pypi
-  user: "__token__"
-  password:
-    secure: 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
-  on:
-    tags: true
-  skip_existing: true
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..28a3a5f
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,289 @@
+[[package]]
+name = "atomicwrites"
+version = "1.4.0"
+description = "Atomic file writes."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "attrs"
+version = "21.2.0"
+description = "Classes Without Boilerplate"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.extras]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface", "furo", "sphinx", "sphinx-notfound-page", "pre-commit"]
+docs = ["furo", "sphinx", "zope.interface", "sphinx-notfound-page"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins", "zope.interface"]
+tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "mypy", "pytest-mypy-plugins"]
+
+[[package]]
+name = "colorama"
+version = "0.4.4"
+description = "Cross-platform colored terminal text."
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[[package]]
+name = "coverage"
+version = "5.5"
+description = "Code coverage measurement for Python"
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
+
+[package.extras]
+toml = ["toml"]
+
+[[package]]
+name = "importlib-metadata"
+version = "4.5.0"
+description = "Read metadata from Python packages"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+typing-extensions = {version = ">=3.6.4", markers = "python_version < \"3.8\""}
+zipp = ">=0.5"
+
+[package.extras]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=4.6)", "pytest-checkdocs (>=2.4)", "pytest-flake8", "pytest-cov", "pytest-enabler (>=1.0.1)", "packaging", "pep517", "pyfakefs", "flufl.flake8", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
+
+[[package]]
+name = "iniconfig"
+version = "1.1.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "packaging"
+version = "20.9"
+description = "Core utilities for Python packages"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+pyparsing = ">=2.0.2"
+
+[[package]]
+name = "pluggy"
+version = "0.13.1"
+description = "plugin and hook calling mechanisms for python"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[package.dependencies]
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+
+[package.extras]
+dev = ["pre-commit", "tox"]
+
+[[package]]
+name = "py"
+version = "1.10.0"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "main"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+
+[[package]]
+name = "pyparsing"
+version = "2.4.7"
+description = "Python parsing module"
+category = "main"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "pytest"
+version = "6.2.4"
+description = "pytest: simple powerful testing with Python"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.dependencies]
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
+attrs = ">=19.2.0"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+iniconfig = "*"
+packaging = "*"
+pluggy = ">=0.12,<1.0.0a1"
+py = ">=1.8.2"
+toml = "*"
+
+[package.extras]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
+
+[[package]]
+name = "pytest-cov"
+version = "2.12.1"
+description = "Pytest plugin for measuring coverage."
+category = "dev"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+
+[package.dependencies]
+coverage = ">=5.2.1"
+pytest = ">=4.6"
+toml = "*"
+
+[package.extras]
+testing = ["fields", "hunter", "process-tests", "six", "pytest-xdist", "virtualenv"]
+
+[[package]]
+name = "toml"
+version = "0.10.2"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "main"
+optional = false
+python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+
+[[package]]
+name = "typing-extensions"
+version = "3.10.0.0"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+category = "main"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "zipp"
+version = "3.4.1"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "main"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
+testing = ["pytest (>=4.6)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
+
+[metadata]
+lock-version = "1.1"
+python-versions = "^3.6"
+content-hash = "6e0360441747bdc93ef1c6621edd351ecd49a140fdeef03a0b4318a7991f5d17"
+
+[metadata.files]
+atomicwrites = [
+    {file = "atomicwrites-1.4.0-py2.py3-none-any.whl", hash = "sha256:6d1784dea7c0c8d4a5172b6c620f40b6e4cbfdf96d783691f2e1302a7b88e197"},
+    {file = "atomicwrites-1.4.0.tar.gz", hash = "sha256:ae70396ad1a434f9c7046fd2dd196fc04b12f9e91ffb859164193be8b6168a7a"},
+]
+attrs = [
+    {file = "attrs-21.2.0-py2.py3-none-any.whl", hash = "sha256:149e90d6d8ac20db7a955ad60cf0e6881a3f20d37096140088356da6c716b0b1"},
+    {file = "attrs-21.2.0.tar.gz", hash = "sha256:ef6aaac3ca6cd92904cdd0d83f629a15f18053ec84e6432106f7a4d04ae4f5fb"},
+]
+colorama = [
+    {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
+    {file = "colorama-0.4.4.tar.gz", hash = "sha256:5941b2b48a20143d2267e95b1c2a7603ce057ee39fd88e7329b0c292aa16869b"},
+]
+coverage = [
+    {file = "coverage-5.5-cp27-cp27m-macosx_10_9_x86_64.whl", hash = "sha256:b6d534e4b2ab35c9f93f46229363e17f63c53ad01330df9f2d6bd1187e5eaacf"},
+    {file = "coverage-5.5-cp27-cp27m-manylinux1_i686.whl", hash = "sha256:b7895207b4c843c76a25ab8c1e866261bcfe27bfaa20c192de5190121770672b"},
+    {file = "coverage-5.5-cp27-cp27m-manylinux1_x86_64.whl", hash = "sha256:c2723d347ab06e7ddad1a58b2a821218239249a9e4365eaff6649d31180c1669"},
+    {file = "coverage-5.5-cp27-cp27m-manylinux2010_i686.whl", hash = "sha256:900fbf7759501bc7807fd6638c947d7a831fc9fdf742dc10f02956ff7220fa90"},
+    {file = "coverage-5.5-cp27-cp27m-manylinux2010_x86_64.whl", hash = "sha256:004d1880bed2d97151facef49f08e255a20ceb6f9432df75f4eef018fdd5a78c"},
+    {file = "coverage-5.5-cp27-cp27m-win32.whl", hash = "sha256:06191eb60f8d8a5bc046f3799f8a07a2d7aefb9504b0209aff0b47298333302a"},
+    {file = "coverage-5.5-cp27-cp27m-win_amd64.whl", hash = "sha256:7501140f755b725495941b43347ba8a2777407fc7f250d4f5a7d2a1050ba8e82"},
+    {file = "coverage-5.5-cp27-cp27mu-manylinux1_i686.whl", hash = "sha256:372da284cfd642d8e08ef606917846fa2ee350f64994bebfbd3afb0040436905"},
+    {file = "coverage-5.5-cp27-cp27mu-manylinux1_x86_64.whl", hash = "sha256:8963a499849a1fc54b35b1c9f162f4108017b2e6db2c46c1bed93a72262ed083"},
+    {file = "coverage-5.5-cp27-cp27mu-manylinux2010_i686.whl", hash = "sha256:869a64f53488f40fa5b5b9dcb9e9b2962a66a87dab37790f3fcfb5144b996ef5"},
+    {file = "coverage-5.5-cp27-cp27mu-manylinux2010_x86_64.whl", hash = "sha256:4a7697d8cb0f27399b0e393c0b90f0f1e40c82023ea4d45d22bce7032a5d7b81"},
+    {file = "coverage-5.5-cp310-cp310-macosx_10_14_x86_64.whl", hash = "sha256:8d0a0725ad7c1a0bcd8d1b437e191107d457e2ec1084b9f190630a4fb1af78e6"},
+    {file = "coverage-5.5-cp310-cp310-manylinux1_x86_64.whl", hash = "sha256:51cb9476a3987c8967ebab3f0fe144819781fca264f57f89760037a2ea191cb0"},
+    {file = "coverage-5.5-cp310-cp310-win_amd64.whl", hash = "sha256:c0891a6a97b09c1f3e073a890514d5012eb256845c451bd48f7968ef939bf4ae"},
+    {file = "coverage-5.5-cp35-cp35m-macosx_10_9_x86_64.whl", hash = "sha256:3487286bc29a5aa4b93a072e9592f22254291ce96a9fbc5251f566b6b7343cdb"},
+    {file = "coverage-5.5-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:deee1077aae10d8fa88cb02c845cfba9b62c55e1183f52f6ae6a2df6a2187160"},
+    {file = "coverage-5.5-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:f11642dddbb0253cc8853254301b51390ba0081750a8ac03f20ea8103f0c56b6"},
+    {file = "coverage-5.5-cp35-cp35m-manylinux2010_i686.whl", hash = "sha256:6c90e11318f0d3c436a42409f2749ee1a115cd8b067d7f14c148f1ce5574d701"},
+    {file = "coverage-5.5-cp35-cp35m-manylinux2010_x86_64.whl", hash = "sha256:30c77c1dc9f253283e34c27935fded5015f7d1abe83bc7821680ac444eaf7793"},
+    {file = "coverage-5.5-cp35-cp35m-win32.whl", hash = "sha256:9a1ef3b66e38ef8618ce5fdc7bea3d9f45f3624e2a66295eea5e57966c85909e"},
+    {file = "coverage-5.5-cp35-cp35m-win_amd64.whl", hash = "sha256:972c85d205b51e30e59525694670de6a8a89691186012535f9d7dbaa230e42c3"},
+    {file = "coverage-5.5-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:af0e781009aaf59e25c5a678122391cb0f345ac0ec272c7961dc5455e1c40066"},
+    {file = "coverage-5.5-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:74d881fc777ebb11c63736622b60cb9e4aee5cace591ce274fb69e582a12a61a"},
+    {file = "coverage-5.5-cp36-cp36m-manylinux1_x86_64.whl", hash = "sha256:92b017ce34b68a7d67bd6d117e6d443a9bf63a2ecf8567bb3d8c6c7bc5014465"},
+    {file = "coverage-5.5-cp36-cp36m-manylinux2010_i686.whl", hash = "sha256:d636598c8305e1f90b439dbf4f66437de4a5e3c31fdf47ad29542478c8508bbb"},
+    {file = "coverage-5.5-cp36-cp36m-manylinux2010_x86_64.whl", hash = "sha256:41179b8a845742d1eb60449bdb2992196e211341818565abded11cfa90efb821"},
+    {file = "coverage-5.5-cp36-cp36m-win32.whl", hash = "sha256:040af6c32813fa3eae5305d53f18875bedd079960822ef8ec067a66dd8afcd45"},
+    {file = "coverage-5.5-cp36-cp36m-win_amd64.whl", hash = "sha256:5fec2d43a2cc6965edc0bb9e83e1e4b557f76f843a77a2496cbe719583ce8184"},
+    {file = "coverage-5.5-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:18ba8bbede96a2c3dde7b868de9dcbd55670690af0988713f0603f037848418a"},
+    {file = "coverage-5.5-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:2910f4d36a6a9b4214bb7038d537f015346f413a975d57ca6b43bf23d6563b53"},
+    {file = "coverage-5.5-cp37-cp37m-manylinux1_x86_64.whl", hash = "sha256:f0b278ce10936db1a37e6954e15a3730bea96a0997c26d7fee88e6c396c2086d"},
+    {file = "coverage-5.5-cp37-cp37m-manylinux2010_i686.whl", hash = "sha256:796c9c3c79747146ebd278dbe1e5c5c05dd6b10cc3bcb8389dfdf844f3ead638"},
+    {file = "coverage-5.5-cp37-cp37m-manylinux2010_x86_64.whl", hash = "sha256:53194af30d5bad77fcba80e23a1441c71abfb3e01192034f8246e0d8f99528f3"},
+    {file = "coverage-5.5-cp37-cp37m-win32.whl", hash = "sha256:184a47bbe0aa6400ed2d41d8e9ed868b8205046518c52464fde713ea06e3a74a"},
+    {file = "coverage-5.5-cp37-cp37m-win_amd64.whl", hash = "sha256:2949cad1c5208b8298d5686d5a85b66aae46d73eec2c3e08c817dd3513e5848a"},
+    {file = "coverage-5.5-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:217658ec7187497e3f3ebd901afdca1af062b42cfe3e0dafea4cced3983739f6"},
+    {file = "coverage-5.5-cp38-cp38-manylinux1_i686.whl", hash = "sha256:1aa846f56c3d49205c952d8318e76ccc2ae23303351d9270ab220004c580cfe2"},
+    {file = "coverage-5.5-cp38-cp38-manylinux1_x86_64.whl", hash = "sha256:24d4a7de75446be83244eabbff746d66b9240ae020ced65d060815fac3423759"},
+    {file = "coverage-5.5-cp38-cp38-manylinux2010_i686.whl", hash = "sha256:d1f8bf7b90ba55699b3a5e44930e93ff0189aa27186e96071fac7dd0d06a1873"},
+    {file = "coverage-5.5-cp38-cp38-manylinux2010_x86_64.whl", hash = "sha256:970284a88b99673ccb2e4e334cfb38a10aab7cd44f7457564d11898a74b62d0a"},
+    {file = "coverage-5.5-cp38-cp38-win32.whl", hash = "sha256:01d84219b5cdbfc8122223b39a954820929497a1cb1422824bb86b07b74594b6"},
+    {file = "coverage-5.5-cp38-cp38-win_amd64.whl", hash = "sha256:2e0d881ad471768bf6e6c2bf905d183543f10098e3b3640fc029509530091502"},
+    {file = "coverage-5.5-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:d1f9ce122f83b2305592c11d64f181b87153fc2c2bbd3bb4a3dde8303cfb1a6b"},
+    {file = "coverage-5.5-cp39-cp39-manylinux1_i686.whl", hash = "sha256:13c4ee887eca0f4c5a247b75398d4114c37882658300e153113dafb1d76de529"},
+    {file = "coverage-5.5-cp39-cp39-manylinux1_x86_64.whl", hash = "sha256:52596d3d0e8bdf3af43db3e9ba8dcdaac724ba7b5ca3f6358529d56f7a166f8b"},
+    {file = "coverage-5.5-cp39-cp39-manylinux2010_i686.whl", hash = "sha256:2cafbbb3af0733db200c9b5f798d18953b1a304d3f86a938367de1567f4b5bff"},
+    {file = "coverage-5.5-cp39-cp39-manylinux2010_x86_64.whl", hash = "sha256:44d654437b8ddd9eee7d1eaee28b7219bec228520ff809af170488fd2fed3e2b"},
+    {file = "coverage-5.5-cp39-cp39-win32.whl", hash = "sha256:d314ed732c25d29775e84a960c3c60808b682c08d86602ec2c3008e1202e3bb6"},
+    {file = "coverage-5.5-cp39-cp39-win_amd64.whl", hash = "sha256:13034c4409db851670bc9acd836243aeee299949bd5673e11844befcb0149f03"},
+    {file = "coverage-5.5-pp36-none-any.whl", hash = "sha256:f030f8873312a16414c0d8e1a1ddff2d3235655a2174e3648b4fa66b3f2f1079"},
+    {file = "coverage-5.5-pp37-none-any.whl", hash = "sha256:2a3859cb82dcbda1cfd3e6f71c27081d18aa251d20a17d87d26d4cd216fb0af4"},
+    {file = "coverage-5.5.tar.gz", hash = "sha256:ebe78fe9a0e874362175b02371bdfbee64d8edc42a044253ddf4ee7d3c15212c"},
+]
+importlib-metadata = [
+    {file = "importlib_metadata-4.5.0-py3-none-any.whl", hash = "sha256:833b26fb89d5de469b24a390e9df088d4e52e4ba33b01dc5e0e4f41b81a16c00"},
+    {file = "importlib_metadata-4.5.0.tar.gz", hash = "sha256:b142cc1dd1342f31ff04bb7d022492b09920cb64fed867cd3ea6f80fe3ebd139"},
+]
+iniconfig = [
+    {file = "iniconfig-1.1.1-py2.py3-none-any.whl", hash = "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3"},
+    {file = "iniconfig-1.1.1.tar.gz", hash = "sha256:bc3af051d7d14b2ee5ef9969666def0cd1a000e121eaea580d4a313df4b37f32"},
+]
+packaging = [
+    {file = "packaging-20.9-py2.py3-none-any.whl", hash = "sha256:67714da7f7bc052e064859c05c595155bd1ee9f69f76557e21f051443c20947a"},
+    {file = "packaging-20.9.tar.gz", hash = "sha256:5b327ac1320dc863dca72f4514ecc086f31186744b84a230374cc1fd776feae5"},
+]
+pluggy = [
+    {file = "pluggy-0.13.1-py2.py3-none-any.whl", hash = "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"},
+    {file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
+]
+py = [
+    {file = "py-1.10.0-py2.py3-none-any.whl", hash = "sha256:3b80836aa6d1feeaa108e046da6423ab8f6ceda6468545ae8d02d9d58d18818a"},
+    {file = "py-1.10.0.tar.gz", hash = "sha256:21b81bda15b66ef5e1a777a21c4dcd9c20ad3efd0b3f817e7a809035269e1bd3"},
+]
+pyparsing = [
+    {file = "pyparsing-2.4.7-py2.py3-none-any.whl", hash = "sha256:ef9d7589ef3c200abe66653d3f1ab1033c3c419ae9b9bdb1240a85b024efc88b"},
+    {file = "pyparsing-2.4.7.tar.gz", hash = "sha256:c203ec8783bf771a155b207279b9bccb8dea02d8f0c9e5f8ead507bc3246ecc1"},
+]
+pytest = [
+    {file = "pytest-6.2.4-py3-none-any.whl", hash = "sha256:91ef2131a9bd6be8f76f1f08eac5c5317221d6ad1e143ae03894b862e8976890"},
+    {file = "pytest-6.2.4.tar.gz", hash = "sha256:50bcad0a0b9c5a72c8e4e7c9855a3ad496ca6a881a3641b4260605450772c54b"},
+]
+pytest-cov = [
+    {file = "pytest-cov-2.12.1.tar.gz", hash = "sha256:261ceeb8c227b726249b376b8526b600f38667ee314f910353fa318caa01f4d7"},
+    {file = "pytest_cov-2.12.1-py2.py3-none-any.whl", hash = "sha256:261bb9e47e65bd099c89c3edf92972865210c36813f80ede5277dceb77a4a62a"},
+]
+toml = [
+    {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
+    {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
+]
+typing-extensions = [
+    {file = "typing_extensions-3.10.0.0-py2-none-any.whl", hash = "sha256:0ac0f89795dd19de6b97debb0c6af1c70987fd80a2d62d1958f7e56fcc31b497"},
+    {file = "typing_extensions-3.10.0.0-py3-none-any.whl", hash = "sha256:779383f6086d90c99ae41cf0ff39aac8a7937a9283ce0a414e5dd782f4c94a84"},
+    {file = "typing_extensions-3.10.0.0.tar.gz", hash = "sha256:50b6f157849174217d0656f99dc82fe932884fb250826c18350e159ec6cdf342"},
+]
+zipp = [
+    {file = "zipp-3.4.1-py3-none-any.whl", hash = "sha256:51cb66cc54621609dd593d1787f286ee42a5c0adbb4b29abea5a63edc3e03098"},
+    {file = "zipp-3.4.1.tar.gz", hash = "sha256:3607921face881ba3e026887d8150cca609d517579abe052ac81fc5aeffdbd76"},
+]
diff --git a/pyproject.toml b/pyproject.toml
index 5431fe5..8469f98 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,58 @@
+[tool.poetry]
+name = "pytest-split"
+version = "0.2.1"
+description = "Pytest plugin for splitting test suite based on test execution time"
+homepage = 'https://github.com/jerry-git/pytest-split'
+repository = 'https://github.com/jerry-git/pytest-split'
+authors = ["Jerry Pussinen <jerry.pussinen@gmail.com>"]
+maintainers = []
+readme = 'README.md'
+keywords = ['pytest', 'plugin', 'split', 'tests']
+packages = [{ include = 'src/pytest_split' }]
+license = "MIT"
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.6",
+    "Programming Language :: Python :: 3.7",
+    "Programming Language :: Python :: 3.8",
+    "Programming Language :: Python :: 3.9",
+    "Framework :: Pytest",
+    "Typing :: Typed",
+]
+
+[tool.poetry.dependencies]
+python = "^3.6"
+pytest = "^5 | ^6"
+
+[tool.poetry.dev-dependencies]
+pytest-cov = "^2.12.1"
+
+[build-system]
+requires = ["poetry-core>=1.0.0"]
+build-backend = "poetry.core.masonry.api"
+
+[tool.poetry.plugins.pytest11]
+pytest-split = "src.pytest_split.plugin"
+
 [tool.black]
 line-length = 120
 include = '\.pyi?$'
+
+[tool.coverage.run]
+source = ["src/pytest_split/*"]
+omit = []
+branch = true
+
+[tool.coverage.report]
+show_missing = true
+skip_covered = true
+exclude_lines = [
+    'if TYPE_CHECKING:',
+]
+
+[tool.isort]
+profile = 'black'
+line_length = 120
diff --git a/setup.py b/setup.py
deleted file mode 100644
index f0a3bea..0000000
--- a/setup.py
+++ /dev/null
@@ -1,38 +0,0 @@
-import setuptools
-
-with open("README.md", "r") as readme_file:
-    long_description = readme_file.read()
-
-tests_require = ["pytest", "pytest-cov", "pre-commit"]
-
-setuptools.setup(
-    name="pytest-split",
-    use_scm_version={"write_to": "src/pytest_split/_version.py"},
-    author="Jerry Pussinen",
-    author_email="jerry.pussinen@gmail.com",
-    description="Pytest plugin for splitting test suite based on test execution time",
-    long_description=long_description,
-    long_description_content_type="text/markdown",
-    url="https://github.com/jerry-git/pytest-split",
-    packages=setuptools.find_packages(where="src"),
-    package_dir={"": "src"},
-    include_package_data=True,
-    setup_requires=["setuptools-scm"],
-    tests_require=tests_require,
-    install_requires=["pytest"],
-    extras_require={"testing": tests_require},
-    classifiers=[
-        "Development Status :: 4 - Beta",
-        "Intended Audience :: Developers",
-        "Operating System :: OS Independent",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
-        "Framework :: Pytest",
-        "Typing :: Typed",
-    ],
-    entry_points={"pytest11": ["pytest-split = pytest_split.plugin"]},
-    package_data={"pytest_split": ["py.typed"]},
-)
diff --git a/src/pytest_split/__init__.py b/src/pytest_split/__init__.py
index b570882..e69de29 100644
--- a/src/pytest_split/__init__.py
+++ b/src/pytest_split/__init__.py
@@ -1,3 +0,0 @@
-from ._version import version as __version__
-
-__all__ = ("__version__",)
diff --git a/src/pytest_split/plugin.py b/src/pytest_split/plugin.py
index 0d129ef..d71769b 100644
--- a/src/pytest_split/plugin.py
+++ b/src/pytest_split/plugin.py
@@ -7,13 +7,12 @@
 from _pytest.reports import TestReport
 
 if TYPE_CHECKING:
-    from typing import List, Tuple, Optional, Union
+    from typing import List, Optional, Tuple, Union
 
     from _pytest import nodes
-
-    from _pytest.main import ExitCode
     from _pytest.config import Config
     from _pytest.config.argparsing import Parser
+    from _pytest.main import ExitCode
 
 # Ugly hack for freezegun compatibility: https://github.com/spulec/freezegun/issues/286
 STORE_DURATIONS_SETUP_AND_TEARDOWN_THRESHOLD = 60 * 10  # seconds
diff --git a/tests/test_version.py b/tests/test_version.py
deleted file mode 100644
index 8c3661f..0000000
--- a/tests/test_version.py
+++ /dev/null
@@ -1,5 +0,0 @@
-import pytest_split
-
-
-def test_version() -> None:
-    assert pytest_split.__version__ is not None