diff --git a/poetry.lock b/poetry.lock
index ec98c78..ab33237 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -31,6 +31,12 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 version = "19.3.0"
 
+[package.extras]
+azure-pipelines = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "pytest-azurepipelines"]
+dev = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "pre-commit"]
+docs = ["sphinx", "zope.interface"]
+tests = ["coverage", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+
 [[package]]
 category = "main"
 description = "Internationalization utilities"
@@ -71,6 +77,9 @@ attrs = ">=18.1.0"
 click = ">=6.5"
 toml = ">=0.9.4"
 
+[package.extras]
+d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
+
 [[package]]
 category = "main"
 description = "Python package for providing Mozilla's CA Bundle."
@@ -125,6 +134,9 @@ coverage = ">=3.6,<6.0"
 docopt = ">=0.6.1"
 requests = ">=1.0.0"
 
+[package.extras]
+yaml = ["PyYAML (>=3.10,<5.3)"]
+
 [[package]]
 category = "dev"
 description = "Formats docstrings to follow PEP 257."
@@ -201,13 +213,24 @@ category = "dev"
 description = "A library for property-based testing"
 name = "hypothesis"
 optional = false
-python-versions = ">=3.5"
-version = "5.1.0"
+python-versions = ">=3.5.2"
+version = "5.8.0"
 
 [package.dependencies]
 attrs = ">=19.2.0"
 sortedcontainers = ">=2.1.0,<3.0.0"
 
+[package.extras]
+all = ["django (>=1.11)", "dpcontracts (>=0.4)", "lark-parser (>=0.6.5)", "numpy (>=1.9.0)", "pandas (>=0.19)", "pytest (>=4.3)", "python-dateutil (>=1.4)", "pytz (>=2014.1)"]
+dateutil = ["python-dateutil (>=1.4)"]
+django = ["pytz (>=2014.1)", "django (>=1.11)"]
+dpcontracts = ["dpcontracts (>=0.4)"]
+lark = ["lark-parser (>=0.6.5)"]
+numpy = ["numpy (>=1.9.0)"]
+pandas = ["pandas (>=0.19)"]
+pytest = ["pytest (>=4.3)"]
+pytz = ["pytz (>=2014.1)"]
+
 [[package]]
 category = "main"
 description = "Internationalized Domain Names in Applications (IDNA)"
@@ -236,6 +259,10 @@ version = "1.5.0"
 [package.dependencies]
 zipp = ">=0.5"
 
+[package.extras]
+docs = ["sphinx", "rst.linker"]
+testing = ["packaging", "importlib-resources"]
+
 [[package]]
 category = "dev"
 description = "A Python utility / library to sort Python imports."
@@ -244,6 +271,12 @@ optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 version = "4.3.21"
 
+[package.extras]
+pipfile = ["pipreqs", "requirementslib"]
+pyproject = ["toml"]
+requirements = ["pipreqs", "pip-api"]
+xdg_home = ["appdirs (>=1.4.0)"]
+
 [[package]]
 category = "main"
 description = "A very fast and expressive template engine."
@@ -255,6 +288,9 @@ version = "2.11.1"
 [package.dependencies]
 MarkupSafe = ">=0.23"
 
+[package.extras]
+i18n = ["Babel (>=0.8)"]
+
 [[package]]
 category = "main"
 description = "Safely add untrusted strings to HTML/XML markup."
@@ -292,6 +328,9 @@ mypy-extensions = ">=0.4.3,<0.5.0"
 typed-ast = ">=1.4.0,<1.5.0"
 typing-extensions = ">=3.7.4"
 
+[package.extras]
+dmypy = ["psutil (>=4.0)"]
+
 [[package]]
 category = "main"
 description = "Experimental type system extensions for programs checked with the mypy typechecker."
@@ -333,6 +372,9 @@ version = "0.13.1"
 python = "<3.8"
 version = ">=0.12"
 
+[package.extras]
+dev = ["pre-commit", "tox"]
+
 [[package]]
 category = "dev"
 description = "library with cross-python path, ini-parsing, io, code, log facilities"
@@ -395,6 +437,10 @@ wcwidth = "*"
 python = "<3.8"
 version = ">=0.12"
 
+[package.extras]
+checkqa-mypy = ["mypy (v0.761)"]
+testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
+
 [[package]]
 category = "dev"
 description = "Pytest plugin for measuring coverage."
@@ -407,6 +453,9 @@ version = "2.8.1"
 coverage = ">=4.4"
 pytest = ">=3.6"
 
+[package.extras]
+testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "virtualenv"]
+
 [[package]]
 category = "main"
 description = "World timezone definitions, modern and historical"
@@ -437,6 +486,10 @@ chardet = ">=3.0.2,<4"
 idna = ">=2.5,<3"
 urllib3 = ">=1.21.1,<1.25.0 || >1.25.0,<1.25.1 || >1.25.1,<1.26"
 
+[package.extras]
+security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7)", "win-inet-pton"]
+
 [[package]]
 category = "main"
 description = "Python 2 and 3 compatibility utilities"
@@ -496,6 +549,10 @@ sphinxcontrib-jsmath = "*"
 sphinxcontrib-qthelp = "*"
 sphinxcontrib-serializinghtml = "*"
 
+[package.extras]
+docs = ["sphinxcontrib-websupport"]
+test = ["pytest (<5.3.3)", "pytest-cov", "html5lib", "flake8 (>=3.5.0)", "flake8-import-order", "mypy (>=0.761)", "docutils-stubs"]
+
 [[package]]
 category = "main"
 description = "Type hints (PEP 484) support for the Sphinx autodoc extension"
@@ -507,6 +564,10 @@ version = "1.10.3"
 [package.dependencies]
 Sphinx = ">=2.1"
 
+[package.extras]
+test = ["pytest (>=3.1.0)", "typing-extensions (>=3.5)", "sphobjinv (>=2.0)", "dataclasses"]
+type_comments = ["typed-ast (>=1.4.0)"]
+
 [[package]]
 category = "main"
 description = "sphinxcontrib-applehelp is a sphinx extension which outputs Apple help books"
@@ -515,6 +576,10 @@ optional = true
 python-versions = ">=3.5"
 version = "1.0.2"
 
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
 [[package]]
 category = "main"
 description = "sphinxcontrib-devhelp is a sphinx extension which outputs Devhelp document."
@@ -523,6 +588,10 @@ optional = true
 python-versions = ">=3.5"
 version = "1.0.2"
 
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
 [[package]]
 category = "main"
 description = "sphinxcontrib-htmlhelp is a sphinx extension which renders HTML help files"
@@ -531,6 +600,10 @@ optional = true
 python-versions = ">=3.5"
 version = "1.0.3"
 
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest", "html5lib"]
+
 [[package]]
 category = "main"
 description = "A sphinx extension which renders display math in HTML via JavaScript"
@@ -539,6 +612,9 @@ optional = true
 python-versions = ">=3.5"
 version = "1.0.1"
 
+[package.extras]
+test = ["pytest", "flake8", "mypy"]
+
 [[package]]
 category = "main"
 description = "sphinxcontrib-qthelp is a sphinx extension which outputs QtHelp document."
@@ -547,6 +623,10 @@ optional = true
 python-versions = ">=3.5"
 version = "1.0.3"
 
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
 [[package]]
 category = "main"
 description = "sphinxcontrib-serializinghtml is a sphinx extension which outputs \"serialized\" HTML files (json and pickle)."
@@ -555,6 +635,10 @@ optional = true
 python-versions = ">=3.5"
 version = "1.1.4"
 
+[package.extras]
+lint = ["flake8", "mypy", "docutils-stubs"]
+test = ["pytest"]
+
 [[package]]
 category = "dev"
 description = "Manage dynamic plugins for Python applications"
@@ -607,6 +691,10 @@ optional = false
 python-versions = "*"
 version = "1.22"
 
+[package.extras]
+secure = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)", "idna (>=2.0.0)", "certifi", "ipaddress"]
+socks = ["PySocks (>=1.5.6,<1.5.7 || >1.5.7,<2.0)"]
+
 [[package]]
 category = "dev"
 description = "Measures number of Terminal column cells of wide-character codes"
@@ -624,75 +712,379 @@ optional = false
 python-versions = ">=3.6"
 version = "3.1.0"
 
+[package.extras]
+docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
+testing = ["jaraco.itertools", "func-timeout"]
+
 [extras]
 docs = ["sphinx", "sphinx-autodoc-typehints", "toml"]
 
 [metadata]
-content-hash = "eb4453c0d45b7760e09e51dfea7dd4086a112daa5795058cf3d67ddaea58ed0c"
+content-hash = "f6c6620483ff09570246a152f84b95a353c771509fc9c09ee3318bac5011225b"
 python-versions = ">= 3.6"
 
-[metadata.hashes]
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-attrs = ["08a96c641c3a74e44eb59afb61a24f2cb9f4d7188748e76ba4bb5edfa3cb7d1c", "f7b7ce16570fe9965acd6d30101a28f62fb4a7f9e926b3bbc9b61f8b04247e72"]
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-coveralls = ["4b6bfc2a2a77b890f556bc631e35ba1ac21193c356393b66c84465c06218e135", "67188c7ec630c5f708c31552f2bcdac4580e172219897c4136504f14b823132f"]
-docformatter = ["d8db663665becccac75737b2635a06076f2c832bf861322a7bfc512f0a9fa7e3"]
-docopt = ["49b3a825280bd66b3aa83585ef59c4a8c82f2c8a522dbe754a8bc8d08c85c491"]
-docutils = ["0c5b78adfbf7762415433f5515cd5c9e762339e23369dbe8000d84a4bf4ab3af", "c2de3a60e9e7d07be26b7f2b00ca0309c207e06c100f9cc2a94931fc75a478fc"]
-entrypoints = ["589f874b313739ad35be6e0cd7efde2a4e9b6fea91edcc34e58ecbb8dbe56d19", "c70dd71abe5a8c85e55e12c19bd91ccfeec11a6e99044204511f9ed547d48451"]
-flake8 = ["45681a117ecc81e870cbf1262835ae4af5e7a8b08e40b944a8a6e6b895914cfb", "49356e766643ad15072a789a20915d3c91dc89fd313ccd71802303fd67e4deca"]
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-hypothesis = ["1b03916e72265655378c5e67f27663adb1e6175fe1ad906d58997b7a04ce99ad", "6abd5740ed05dff9efe0df18f0f7013eb4aa99c143f7177fbefb603888a990d0"]
-idna = ["7588d1c14ae4c77d74036e8c22ff447b26d0fde8f007354fd48a7814db15b7cb", "a068a21ceac8a4d63dbfd964670474107f541babbd2250d61922f029858365fa"]
-imagesize = ["6965f19a6a2039c7d48bca7dba2473069ff854c36ae6f19d2cde309d998228a1", "b1f6b5a4eab1f73479a50fb79fcf729514a900c341d8503d62a62dbc4127a2b1"]
-importlib-metadata = ["06f5b3a99029c7134207dd882428a66992a9de2bef7c2b699b5641f9886c3302", "b97607a1a18a5100839aec1dc26a1ea17ee0d93b20b0f008d80a5a050afb200b"]
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+    {file = "typing_extensions-3.7.4.1-py3-none-any.whl", hash = "sha256:cf8b63fedea4d89bab840ecbb93e75578af28f76f66c35889bd7065f5af88575"},
+    {file = "typing_extensions-3.7.4.1.tar.gz", hash = "sha256:091ecc894d5e908ac75209f10d5b4f118fbdb2eb1ede6a63544054bb1edb41f2"},
+]
+untokenize = [
+    {file = "untokenize-0.1.1.tar.gz", hash = "sha256:3865dbbbb8efb4bb5eaa72f1be7f3e0be00ea8b7f125c69cbd1f5fda926f37a2"},
+]
+urllib3 = [
+    {file = "urllib3-1.22-py2.py3-none-any.whl", hash = "sha256:06330f386d6e4b195fbfc736b297f58c5a892e4440e54d294d7004e3a9bbea1b"},
+    {file = "urllib3-1.22.tar.gz", hash = "sha256:cc44da8e1145637334317feebd728bd869a35285b93cbb4cca2577da7e62db4f"},
+]
+wcwidth = [
+    {file = "wcwidth-0.1.9-py2.py3-none-any.whl", hash = "sha256:cafe2186b3c009a04067022ce1dcd79cb38d8d65ee4f4791b8888d6599d1bbe1"},
+    {file = "wcwidth-0.1.9.tar.gz", hash = "sha256:ee73862862a156bf77ff92b09034fc4825dd3af9cf81bc5b360668d425f3c5f1"},
+]
+zipp = [
+    {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
+    {file = "zipp-3.1.0.tar.gz", hash = "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"},
+]
diff --git a/pyproject.toml b/pyproject.toml
index b6aed1b..917066e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ toml = { version = "^0.10.0", optional = true }
 
 [tool.poetry.dev-dependencies]
 pytest = "^5.4"
-hypothesis = "^5.1"
+hypothesis = "^5.8"
 isort = "^4.3"
 flake8 = "^3.7"
 black = "^19.3b0"