Updated files with 'repo_helper'. (#42)

Co-authored-by: repo-helper[bot] <74742576+repo-helper[bot]@users.noreply.github.com>

tox.ini

@@ -17,10 +17,11 @@
 [tox]
 envlist = py36, py37, py38, py39, py310-dev, pypy3, mypy, build
 skip_missing_interpreters = True
+isolated_build = True
 requires =
     pip>=20.3.3
-    tox-envlist>=0.1.0
-isolated_build = True
+    tox-envlist>=0.2.1
+    tox-pip-version>=0.0.7
 
 [envlists]
 test = py36, py37, py38, py39, py310-dev, pypy3
@@ -35,24 +36,13 @@ commands =
     python --version
     python -m pytest --cov=repo_helper -r aR tests/ {posargs}
 
-[testenv:py310-dev]
-setenv = PYTHONDEVMODE = 1
-deps =
-    -r{toxinidir}/tests/requirements.txt
-    git+https://github.com/domdfcoding/python-tabulate
-extras = all
-commands =
-    python --version
-    python -m pytest --cov=repo_helper -r aR tests/ {posargs}
-
 [testenv:docs]
 setenv = SHOW_TODOS = 1
 basepython = python3.8
+pip_version = pip>=21
 changedir = {toxinidir}/doc-source
 extras = all
-deps =
-    -r{toxinidir}/requirements.txt
-    -r{toxinidir}/doc-source/requirements.txt
+deps = -r{toxinidir}/doc-source/requirements.txt
 commands = sphinx-build -M html . ./build {posargs}
 
 [testenv:build]
@@ -84,6 +74,7 @@ deps =
     flake8-sphinx-links>=0.0.4
     flake8-strftime>=0.1.1
     flake8-typing-imports>=1.10.0
+    flake8-encodings>=0.1.0
     git+https://github.com/PyCQA/pydocstyle@5118faa7173b0e5bbc230c4adf628758e13605bf
     git+https://github.com/domdfcoding/flake8-quotes.git
     git+https://github.com/domdfcoding/flake8-rst-docstrings.git
@@ -149,6 +140,16 @@ package = repo_helper
 addopts = --color yes --durations 25
 timeout = 300
 
+[testenv:py310-dev]
+setenv = PYTHONDEVMODE = 1
+deps =
+    -r{toxinidir}/tests/requirements.txt
+    git+https://github.com/domdfcoding/python-tabulate
+extras = all
+commands =
+    python --version
+    python -m pytest --cov=repo_helper -r aR tests/ {posargs}
+
 [gh-actions]
 python =
     3.6: py36, build