diff --git a/poetry.lock b/poetry.lock
index f7aa1ee..1850fa9 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -8,7 +8,7 @@ python-versions = "*"
 
 [[package]]
 name = "apispec"
-version = "4.3.0"
+version = "4.6.0"
 description = "A pluggable API specification generator. Currently supports the OpenAPI Specification (f.k.a. the Swagger specification)."
 category = "main"
 optional = false
@@ -18,10 +18,10 @@ python-versions = ">=3.6"
 PyYAML = {version = ">=3.10", optional = true, markers = "extra == \"yaml\""}
 
 [package.extras]
-dev = ["PyYAML (>=3.10)", "prance[osv] (>=0.11)", "marshmallow (>=3.0.0)", "pytest", "mock", "flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)", "tox"]
-docs = ["marshmallow (>=3.0.0)", "pyyaml (==5.4.1)", "sphinx (==3.4.3)", "sphinx-issues (==1.2.0)", "sphinx-rtd-theme (==0.5.1)"]
-lint = ["flake8 (==3.8.4)", "flake8-bugbear (==20.11.1)", "pre-commit (>=2.4,<3.0)"]
-tests = ["PyYAML (>=3.10)", "prance[osv] (>=0.11)", "marshmallow (>=3.0.0)", "pytest", "mock"]
+dev = ["PyYAML (>=3.10)", "prance[osv] (>=0.11)", "marshmallow (>=3.10.0)", "pytest", "mock", "flake8 (==3.9.2)", "flake8-bugbear (==21.4.3)", "pre-commit (>=2.4,<3.0)", "tox"]
+docs = ["marshmallow (>=3.0.0)", "pyyaml (==5.4.1)", "sphinx (==4.0.2)", "sphinx-issues (==1.2.0)", "sphinx-rtd-theme (==0.5.2)"]
+lint = ["flake8 (==3.9.2)", "flake8-bugbear (==21.4.3)", "pre-commit (>=2.4,<3.0)"]
+tests = ["PyYAML (>=3.10)", "prance[osv] (>=0.11)", "marshmallow (>=3.10.0)", "pytest", "mock"]
 validation = ["prance[osv] (>=0.11)"]
 yaml = ["PyYAML (>=3.10)"]
 
@@ -51,11 +51,11 @@ python-versions = "*"
 
 [[package]]
 name = "astroid"
-version = "2.5.1"
+version = "2.5.6"
 description = "An abstract syntax tree for Python with inference support."
 category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = "~=3.6"
 
 [package.dependencies]
 lazy-object-proxy = ">=1.4.0"
@@ -72,21 +72,21 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "attrs"
-version = "20.3.0"
+version = "21.2.0"
 description = "Classes Without Boilerplate"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+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", "zope.interface", "furo", "sphinx", "pre-commit"]
-docs = ["furo", "sphinx", "zope.interface"]
-tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
-tests_no_zope = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
+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 = "babel"
-version = "2.9.0"
+version = "2.9.1"
 description = "Internationalization utilities"
 category = "dev"
 optional = false
@@ -120,7 +120,7 @@ d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
 
 [[package]]
 name = "certifi"
-version = "2020.11.8"
+version = "2021.5.30"
 description = "Python package for providing Mozilla's CA Bundle."
 category = "dev"
 optional = false
@@ -128,11 +128,11 @@ python-versions = "*"
 
 [[package]]
 name = "chardet"
-version = "3.0.4"
+version = "4.0.0"
 description = "Universal encoding detector for Python 2 and 3"
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "click"
@@ -152,7 +152,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "coverage"
-version = "5.3"
+version = "5.5"
 description = "Code coverage measurement for Python"
 category = "dev"
 optional = false
@@ -179,17 +179,17 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [[package]]
 name = "flask"
-version = "1.1.2"
+version = "1.1.4"
 description = "A simple framework for building complex web applications."
 category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
-click = ">=5.1"
-itsdangerous = ">=0.24"
-Jinja2 = ">=2.10.1"
-Werkzeug = ">=0.15"
+click = ">=5.1,<8.0"
+itsdangerous = ">=0.24,<2.0"
+Jinja2 = ">=2.10.1,<3.0"
+Werkzeug = ">=0.15,<2.0"
 
 [package.extras]
 dev = ["pytest", "coverage", "tox", "sphinx", "pallets-sphinx-themes", "sphinxcontrib-log-cabinet", "sphinx-issues"]
@@ -234,18 +234,19 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "importlib-metadata"
-version = "3.1.1"
+version = "4.5.0"
 description = "Read metadata from Python packages"
 category = "dev"
 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 (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "jaraco.test (>=3.2.0)", "packaging", "pep517", "pyfakefs", "flufl.flake8", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
+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"
@@ -257,7 +258,7 @@ python-versions = "*"
 
 [[package]]
 name = "isort"
-version = "5.6.4"
+version = "5.8.0"
 description = "A Python utility / library to sort Python imports."
 category = "dev"
 optional = false
@@ -310,19 +311,19 @@ format_nongpl = ["idna", "jsonpointer (>1.13)", "webcolors", "rfc3986-validator
 
 [[package]]
 name = "lazy-object-proxy"
-version = "1.4.3"
+version = "1.6.0"
 description = "A fast and thorough lazy object proxy."
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 
 [[package]]
 name = "markupsafe"
-version = "1.1.1"
+version = "2.0.1"
 description = "Safely add untrusted strings to HTML/XML markup."
 category = "main"
 optional = false
-python-versions = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*"
+python-versions = ">=3.6"
 
 [[package]]
 name = "marshmallow"
@@ -372,7 +373,7 @@ python-versions = "*"
 
 [[package]]
 name = "packaging"
-version = "20.7"
+version = "20.9"
 description = "Core utilities for Python packages"
 category = "dev"
 optional = false
@@ -413,7 +414,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "pygments"
-version = "2.7.2"
+version = "2.9.0"
 description = "Pygments is a syntax highlighting package written in Python."
 category = "dev"
 optional = false
@@ -421,22 +422,19 @@ python-versions = ">=3.5"
 
 [[package]]
 name = "pylint"
-version = "2.7.2"
+version = "2.8.3"
 description = "python code static checker"
 category = "dev"
 optional = false
 python-versions = "~=3.6"
 
 [package.dependencies]
-astroid = ">=2.5.1,<2.6"
+astroid = "2.5.6"
 colorama = {version = "*", markers = "sys_platform == \"win32\""}
 isort = ">=4.2.5,<6"
 mccabe = ">=0.6,<0.7"
 toml = ">=0.7.1"
 
-[package.extras]
-docs = ["sphinx (==3.5.1)", "python-docs-theme (==2020.12)"]
-
 [[package]]
 name = "pyparsing"
 version = "2.4.7"
@@ -477,7 +475,7 @@ testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xm
 
 [[package]]
 name = "pytest-cov"
-version = "2.11.1"
+version = "2.12.1"
 description = "Pytest plugin for measuring coverage."
 category = "dev"
 optional = false
@@ -486,13 +484,14 @@ 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 (==2.0.2)", "six", "pytest-xdist", "virtualenv"]
+testing = ["fields", "hunter", "process-tests", "six", "pytest-xdist", "virtualenv"]
 
 [[package]]
 name = "pytz"
-version = "2020.4"
+version = "2021.1"
 description = "World timezone definitions, modern and historical"
 category = "dev"
 optional = false
@@ -500,15 +499,15 @@ python-versions = "*"
 
 [[package]]
 name = "pyyaml"
-version = "5.3.1"
+version = "5.4.1"
 description = "YAML parser and emitter for Python"
 category = "main"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 
 [[package]]
 name = "regex"
-version = "2020.11.13"
+version = "2021.4.4"
 description = "Alternative regular expression module, to replace re."
 category = "dev"
 optional = false
@@ -516,7 +515,7 @@ python-versions = "*"
 
 [[package]]
 name = "requests"
-version = "2.25.0"
+version = "2.25.1"
 description = "Python HTTP for Humans."
 category = "dev"
 optional = false
@@ -524,7 +523,7 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
 
 [package.dependencies]
 certifi = ">=2017.4.17"
-chardet = ">=3.0.2,<4"
+chardet = ">=3.0.2,<5"
 idna = ">=2.5,<3"
 urllib3 = ">=1.21.1,<1.27"
 
@@ -534,7 +533,7 @@ socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
 
 [[package]]
 name = "six"
-version = "1.15.0"
+version = "1.16.0"
 description = "Python 2 and 3 compatibility utilities"
 category = "main"
 optional = false
@@ -542,15 +541,15 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "snowballstemmer"
-version = "2.0.0"
-description = "This package provides 26 stemmers for 25 languages generated from Snowball algorithms."
+version = "2.1.0"
+description = "This package provides 29 stemmers for 28 languages generated from Snowball algorithms."
 category = "dev"
 optional = false
 python-versions = "*"
 
 [[package]]
 name = "sphinx"
-version = "3.5.3"
+version = "3.5.4"
 description = "Python documentation generator"
 category = "dev"
 optional = false
@@ -560,7 +559,7 @@ python-versions = ">=3.5"
 alabaster = ">=0.7,<0.8"
 babel = ">=1.3"
 colorama = {version = ">=0.3.5", markers = "sys_platform == \"win32\""}
-docutils = ">=0.12"
+docutils = ">=0.12,<0.17"
 imagesize = "*"
 Jinja2 = ">=2.3"
 packaging = "*"
@@ -640,11 +639,11 @@ test = ["pytest"]
 
 [[package]]
 name = "sphinxcontrib-htmlhelp"
-version = "1.0.3"
+version = "2.0.0"
 description = "sphinxcontrib-htmlhelp is a sphinx extension which renders HTML help files"
 category = "dev"
 optional = false
-python-versions = ">=3.5"
+python-versions = ">=3.6"
 
 [package.extras]
 lint = ["flake8", "mypy", "docutils-stubs"]
@@ -675,7 +674,7 @@ test = ["pytest"]
 
 [[package]]
 name = "sphinxcontrib-serializinghtml"
-version = "1.1.4"
+version = "1.1.5"
 description = "sphinxcontrib-serializinghtml is a sphinx extension which outputs \"serialized\" HTML files (json and pickle)."
 category = "dev"
 optional = false
@@ -695,7 +694,7 @@ python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
 
 [[package]]
 name = "typed-ast"
-version = "1.4.1"
+version = "1.4.3"
 description = "a fork of Python 2 and 3 ast modules with type comment support"
 category = "dev"
 optional = false
@@ -703,7 +702,7 @@ python-versions = "*"
 
 [[package]]
 name = "typing-extensions"
-version = "3.7.4.3"
+version = "3.10.0.0"
 description = "Backported and Experimental Type Hints for Python 3.5+"
 category = "dev"
 optional = false
@@ -711,7 +710,7 @@ python-versions = "*"
 
 [[package]]
 name = "unidecode"
-version = "1.1.1"
+version = "1.2.0"
 description = "ASCII transliterations of Unicode text"
 category = "dev"
 optional = false
@@ -719,16 +718,16 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
 [[package]]
 name = "urllib3"
-version = "1.26.4"
+version = "1.26.5"
 description = "HTTP library with thread-safe connection pooling, file post, and more."
 category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, <4"
 
 [package.extras]
+brotli = ["brotlipy (>=0.6.0)"]
 secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
 socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
-brotli = ["brotlipy (>=0.6.0)"]
 
 [[package]]
 name = "webargs"
@@ -781,20 +780,20 @@ ifaddr = ">=0.1.7"
 
 [[package]]
 name = "zipp"
-version = "3.4.0"
+version = "3.4.1"
 description = "Backport of pathlib-compatible object wrapper for zip files"
 category = "dev"
 optional = false
 python-versions = ">=3.6"
 
 [package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "jaraco.test (>=3.2.0)", "jaraco.itertools", "func-timeout", "pytest-black (>=0.3.7)", "pytest-mypy"]
+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 = "b6011a7968a8c3beaa277b668b80484bcf65341d83f66ac174bfc8c7d9e5ddd7"
+content-hash = "1347b14cbfb52c4edc62302acfa53e8fdee06d217adad857dcc800ab3e40c046"
 
 [metadata.files]
 alabaster = [
@@ -802,8 +801,8 @@ alabaster = [
     {file = "alabaster-0.7.12.tar.gz", hash = "sha256:a661d72d58e6ea8a57f7a86e37d86716863ee5e92788398526d58b26a4e4dc02"},
 ]
 apispec = [
-    {file = "apispec-4.3.0-py2.py3-none-any.whl", hash = "sha256:83e4d30edce987f4791f950c847d2b8cbe91e55af3d1ac7e3a35011a5c6fdbdd"},
-    {file = "apispec-4.3.0.tar.gz", hash = "sha256:5ec0fe72f1422a1198973fcbb48d0eb5c7390f4b0fbe55474fce999ad6826a9b"},
+    {file = "apispec-4.6.0-py2.py3-none-any.whl", hash = "sha256:6a62e8c5a9f85715089083d013f23ddbbee948c188910e31fad2192f90a49974"},
+    {file = "apispec-4.6.0.tar.gz", hash = "sha256:a896f97394b7d046d46c65262e51e45241dd8d9d71eedebcdb2d7024b775eec4"},
 ]
 apispec-webframeworks = [
     {file = "apispec-webframeworks-0.5.2.tar.gz", hash = "sha256:0db35b267914b3f8c562aca0261957dbcb4176f255eacc22520277010818dcf3"},
@@ -814,31 +813,31 @@ appdirs = [
     {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
 ]
 astroid = [
-    {file = "astroid-2.5.1-py3-none-any.whl", hash = "sha256:21d735aab248253531bb0f1e1e6d068f0ee23533e18ae8a6171ff892b98297cf"},
-    {file = "astroid-2.5.1.tar.gz", hash = "sha256:cfc35498ee64017be059ceffab0a25bedf7548ab76f2bea691c5565896e7128d"},
+    {file = "astroid-2.5.6-py3-none-any.whl", hash = "sha256:4db03ab5fc3340cf619dbc25e42c2cc3755154ce6009469766d7143d1fc2ee4e"},
+    {file = "astroid-2.5.6.tar.gz", hash = "sha256:8a398dfce302c13f14bab13e2b14fe385d32b73f4e4853b9bdfb64598baa1975"},
 ]
 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-20.3.0-py2.py3-none-any.whl", hash = "sha256:31b2eced602aa8423c2aea9c76a724617ed67cf9513173fd3a4f03e3a929c7e6"},
-    {file = "attrs-20.3.0.tar.gz", hash = "sha256:832aa3cde19744e49938b91fea06d69ecb9e649c93ba974535d08ad92164f700"},
+    {file = "attrs-21.2.0-py2.py3-none-any.whl", hash = "sha256:149e90d6d8ac20db7a955ad60cf0e6881a3f20d37096140088356da6c716b0b1"},
+    {file = "attrs-21.2.0.tar.gz", hash = "sha256:ef6aaac3ca6cd92904cdd0d83f629a15f18053ec84e6432106f7a4d04ae4f5fb"},
 ]
 babel = [
-    {file = "Babel-2.9.0-py2.py3-none-any.whl", hash = "sha256:9d35c22fcc79893c3ecc85ac4a56cde1ecf3f19c540bba0922308a6c06ca6fa5"},
-    {file = "Babel-2.9.0.tar.gz", hash = "sha256:da031ab54472314f210b0adcff1588ee5d1d1d0ba4dbd07b94dba82bde791e05"},
+    {file = "Babel-2.9.1-py2.py3-none-any.whl", hash = "sha256:ab49e12b91d937cd11f0b67cb259a57ab4ad2b59ac7a3b41d6c06c0ac5b0def9"},
+    {file = "Babel-2.9.1.tar.gz", hash = "sha256:bc0c176f9f6a994582230df350aa6e05ba2ebe4b3ac317eab29d9be5d2768da0"},
 ]
 black = [
     {file = "black-20.8b1.tar.gz", hash = "sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea"},
 ]
 certifi = [
-    {file = "certifi-2020.11.8-py2.py3-none-any.whl", hash = "sha256:1f422849db327d534e3d0c5f02a263458c3955ec0aae4ff09b95f195c59f4edd"},
-    {file = "certifi-2020.11.8.tar.gz", hash = "sha256:f05def092c44fbf25834a51509ef6e631dc19765ab8a57b4e7ab85531f0a9cf4"},
+    {file = "certifi-2021.5.30-py2.py3-none-any.whl", hash = "sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8"},
+    {file = "certifi-2021.5.30.tar.gz", hash = "sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee"},
 ]
 chardet = [
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diff --git a/pyproject.toml b/pyproject.toml
index 7fbb605..23855b1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
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 Flask = "^1.1.1"
 marshmallow = "^3.4.0"
 webargs = ">=6,<9"
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