diff --git a/poetry.lock b/poetry.lock
index 1528199..8bf9399 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,120 +1,108 @@
 [[package]]
-category = "main"
-description = "Async http client/server framework (asyncio)"
 name = "aiohttp"
+version = "3.7.2"
+description = "Async http client/server framework (asyncio)"
+category = "main"
 optional = false
-python-versions = ">=3.5.3"
-version = "3.6.2"
+python-versions = ">=3.6"
 
 [package.dependencies]
 async-timeout = ">=3.0,<4.0"
 attrs = ">=17.3.0"
 chardet = ">=2.0,<4.0"
-multidict = ">=4.5,<5.0"
+idna-ssl = {version = ">=1.0", markers = "python_version < \"3.7\""}
+multidict = ">=4.5,<7.0"
+typing-extensions = ">=3.6.5"
 yarl = ">=1.0,<2.0"
 
-[package.dependencies.idna-ssl]
-python = "<3.7"
-version = ">=1.0"
-
-[package.dependencies.typing-extensions]
-python = "<3.7"
-version = ">=3.6.5"
-
 [package.extras]
 speedups = ["aiodns", "brotlipy", "cchardet"]
 
 [[package]]
-category = "main"
-description = "Timeout context manager for asyncio programs"
 name = "async-timeout"
+version = "3.0.1"
+description = "Timeout context manager for asyncio programs"
+category = "main"
 optional = false
 python-versions = ">=3.5.3"
-version = "3.0.1"
 
 [[package]]
-category = "dev"
-description = "Atomic file writes."
-marker = "sys_platform == \"win32\""
 name = "atomicwrites"
+version = "1.4.0"
+description = "Atomic file writes."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.4.0"
 
 [[package]]
-category = "main"
-description = "Classes Without Boilerplate"
 name = "attrs"
+version = "20.1.0"
+description = "Classes Without Boilerplate"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.1.0"
 
 [package.extras]
-dev = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "sphinx-rtd-theme", "pre-commit"]
+dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "sphinx", "sphinx-rtd-theme", "pre-commit"]
 docs = ["sphinx", "sphinx-rtd-theme", "zope.interface"]
-tests = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+tests = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
 
 [[package]]
-category = "main"
-description = "Universal encoding detector for Python 2 and 3"
 name = "chardet"
+version = "3.0.4"
+description = "Universal encoding detector for Python 2 and 3"
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.0.4"
 
 [[package]]
-category = "dev"
-description = "Cross-platform colored terminal text."
-marker = "sys_platform == \"win32\""
 name = "colorama"
+version = "0.4.3"
+description = "Cross-platform colored terminal text."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "0.4.3"
 
 [[package]]
-category = "dev"
-description = "Code coverage measurement for Python"
 name = "coverage"
+version = "5.3"
+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"
-version = "5.3"
 
 [package.dependencies]
-[package.dependencies.toml]
-optional = true
-version = "*"
+toml = {version = "*", optional = true, markers = "extra == \"toml\""}
 
 [package.extras]
 toml = ["toml"]
 
 [[package]]
-category = "main"
-description = "Internationalized Domain Names in Applications (IDNA)"
 name = "idna"
+version = "2.10"
+description = "Internationalized Domain Names in Applications (IDNA)"
+category = "main"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "2.10"
 
 [[package]]
-category = "main"
-description = "Patch ssl.match_hostname for Unicode(idna) domains support"
-marker = "python_version < \"3.7\""
 name = "idna-ssl"
+version = "1.1.0"
+description = "Patch ssl.match_hostname for Unicode(idna) domains support"
+category = "main"
 optional = false
 python-versions = "*"
-version = "1.1.0"
 
 [package.dependencies]
 idna = ">=2.0"
 
 [[package]]
-category = "dev"
-description = "Read metadata from Python packages"
-marker = "python_version < \"3.8\""
 name = "importlib-metadata"
+version = "1.7.0"
+description = "Read metadata from Python packages"
+category = "dev"
 optional = false
 python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
-version = "1.7.0"
 
 [package.dependencies]
 zipp = ">=0.5"
@@ -124,191 +112,202 @@ docs = ["sphinx", "rst.linker"]
 testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
 
 [[package]]
-category = "dev"
-description = "iniconfig: brain-dead simple config-ini parsing"
 name = "iniconfig"
+version = "1.0.1"
+description = "iniconfig: brain-dead simple config-ini parsing"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "1.0.1"
 
 [[package]]
-category = "main"
-description = "multidict implementation"
 name = "multidict"
+version = "4.7.6"
+description = "multidict implementation"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "4.7.6"
 
 [[package]]
-category = "dev"
-description = "Core utilities for Python packages"
 name = "packaging"
+version = "20.4"
+description = "Core utilities for Python packages"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "20.4"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
 six = "*"
 
 [[package]]
-category = "dev"
-description = "plugin and hook calling mechanisms for python"
 name = "pluggy"
+version = "0.13.1"
+description = "plugin and hook calling mechanisms for python"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "0.13.1"
 
 [package.dependencies]
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 
 [package.extras]
 dev = ["pre-commit", "tox"]
 
 [[package]]
-category = "dev"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
 name = "py"
+version = "1.9.0"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.9.0"
 
 [[package]]
-category = "dev"
-description = "Python parsing module"
 name = "pyparsing"
+version = "2.4.7"
+description = "Python parsing module"
+category = "dev"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "2.4.7"
 
 [[package]]
-category = "dev"
-description = "pytest: simple powerful testing with Python"
 name = "pytest"
+version = "6.1.0"
+description = "pytest: simple powerful testing with Python"
+category = "dev"
 optional = false
 python-versions = ">=3.5"
-version = "6.1.0"
 
 [package.dependencies]
-atomicwrites = ">=1.0"
+atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
 attrs = ">=17.4.0"
-colorama = "*"
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<1.0"
 py = ">=1.8.2"
 toml = "*"
 
-[package.dependencies.importlib-metadata]
-python = "<3.8"
-version = ">=0.12"
-
 [package.extras]
-checkqa_mypy = ["mypy (0.780)"]
+checkqa_mypy = ["mypy (==0.780)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
-category = "dev"
-description = "pytest plugin for aiohttp support"
 name = "pytest-aiohttp"
+version = "0.3.0"
+description = "pytest plugin for aiohttp support"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.3.0"
 
 [package.dependencies]
 aiohttp = ">=2.3.5"
 pytest = "*"
 
 [[package]]
-category = "dev"
-description = "Pytest plugin for measuring coverage."
 name = "pytest-cov"
+version = "2.10.1"
+description = "Pytest plugin for measuring coverage."
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
-version = "2.10.1"
 
 [package.dependencies]
 coverage = ">=4.4"
 pytest = ">=4.6"
 
 [package.extras]
-testing = ["fields", "hunter", "process-tests (2.0.2)", "six", "pytest-xdist", "virtualenv"]
+testing = ["fields", "hunter", "process-tests (==2.0.2)", "six", "pytest-xdist", "virtualenv"]
 
 [[package]]
-category = "dev"
-description = "Python 2 and 3 compatibility utilities"
 name = "six"
+version = "1.15.0"
+description = "Python 2 and 3 compatibility utilities"
+category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
-version = "1.15.0"
 
 [[package]]
-category = "dev"
-description = "Python Library for Tom's Obvious, Minimal Language"
 name = "toml"
+version = "0.10.1"
+description = "Python Library for Tom's Obvious, Minimal Language"
+category = "dev"
 optional = false
 python-versions = "*"
-version = "0.10.1"
 
 [[package]]
-category = "main"
-description = "Backported and Experimental Type Hints for Python 3.5+"
-marker = "python_version < \"3.8\""
 name = "typing-extensions"
+version = "3.7.4.3"
+description = "Backported and Experimental Type Hints for Python 3.5+"
+category = "main"
 optional = false
 python-versions = "*"
-version = "3.7.4.3"
 
 [[package]]
-category = "main"
-description = "Yet another URL library"
 name = "yarl"
+version = "1.5.1"
+description = "Yet another URL library"
+category = "main"
 optional = false
 python-versions = ">=3.5"
-version = "1.5.1"
 
 [package.dependencies]
 idna = ">=2.0"
 multidict = ">=4.0"
-
-[package.dependencies.typing-extensions]
-python = "<3.8"
-version = ">=3.7.4"
+typing-extensions = {version = ">=3.7.4", markers = "python_version < \"3.8\""}
 
 [[package]]
-category = "dev"
-description = "Backport of pathlib-compatible object wrapper for zip files"
-marker = "python_version < \"3.8\""
 name = "zipp"
+version = "3.1.0"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+category = "dev"
 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"]
 
 [metadata]
-content-hash = "7aad1ef7910e320bd5f88df70396a22fd0ec5d08ef6c7bd7ecde902d1eb6d075"
-lock-version = "1.0"
+lock-version = "1.1"
 python-versions = "^3.6"
+content-hash = "7aad1ef7910e320bd5f88df70396a22fd0ec5d08ef6c7bd7ecde902d1eb6d075"
 
 [metadata.files]
 aiohttp = [
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-    {file = "aiohttp-3.6.2-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:50aaad128e6ac62e7bf7bd1f0c0a24bc968a0c0590a726d5a955af193544bcec"},
-    {file = "aiohttp-3.6.2-cp36-cp36m-macosx_10_13_x86_64.whl", hash = "sha256:65f31b622af739a802ca6fd1a3076fd0ae523f8485c52924a89561ba10c49b48"},
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-    {file = "aiohttp-3.6.2-cp36-cp36m-win32.whl", hash = "sha256:344c780466b73095a72c616fac5ea9c4665add7fc129f285fbdbca3cccf4612a"},
-    {file = "aiohttp-3.6.2-cp36-cp36m-win_amd64.whl", hash = "sha256:4c6efd824d44ae697814a2a85604d8e992b875462c6655da161ff18fd4f29f17"},
-    {file = "aiohttp-3.6.2-cp37-cp37m-macosx_10_13_x86_64.whl", hash = "sha256:2f4d1a4fdce595c947162333353d4a44952a724fba9ca3205a3df99a33d1307a"},
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-    {file = "aiohttp-3.6.2.tar.gz", hash = "sha256:259ab809ff0727d0e834ac5e8a283dc5e3e0ecc30c4d80b3cd17a4139ce1f326"},
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+    {file = "aiohttp-3.7.2.tar.gz", hash = "sha256:c6da1af59841e6d43255d386a2c4bfb59c0a3b262bdb24325cc969d211be6070"},
 ]
 async-timeout = [
     {file = "async-timeout-3.0.1.tar.gz", hash = "sha256:0c3c816a028d47f659d6ff5c745cb2acf1f966da1fe5c19c77a70282b25f4c5f"},