diff --git a/poetry.lock b/poetry.lock
index b13187c..d6fc03e 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,115 +1,124 @@
 [[package]]
-name = "astroid"
-version = "2.4.2"
-description = "An abstract syntax tree for Python with inference support."
 category = "dev"
+description = "An abstract syntax tree for Python with inference support."
+name = "astroid"
 optional = false
 python-versions = ">=3.5"
+version = "2.4.2"
 
 [package.dependencies]
 lazy-object-proxy = ">=1.4.0,<1.5.0"
 six = ">=1.12,<2.0"
-typed-ast = {version = ">=1.4.0,<1.5", markers = "implementation_name == \"cpython\" and python_version < \"3.8\""}
 wrapt = ">=1.11,<2.0"
 
-[[package]]
-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.*"
+[package.dependencies.typed-ast]
+python = "<3.8"
+version = ">=1.4.0,<1.5"
 
 [[package]]
-name = "attrs"
-version = "20.3.0"
-description = "Classes Without Boilerplate"
 category = "dev"
+description = "Atomic file writes."
+marker = "sys_platform == \"win32\""
+name = "atomicwrites"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "1.4.0"
+
+[[package]]
+category = "dev"
+description = "Classes Without Boilerplate"
+name = "attrs"
+optional = false
+python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "20.3.0"
 
 [package.extras]
-dev = ["coverage[toml] (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface", "furo", "sphinx", "pre-commit"]
+dev = ["coverage (>=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"]
+tests = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six", "zope.interface"]
+tests_no_zope = ["coverage (>=5.0.2)", "hypothesis", "pympler", "pytest (>=4.3.0)", "six"]
 
 [[package]]
-name = "colorama"
-version = "0.4.4"
-description = "Cross-platform colored terminal text."
 category = "dev"
+description = "Cross-platform colored terminal text."
+marker = "sys_platform == \"win32\""
+name = "colorama"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+version = "0.4.4"
 
 [[package]]
-name = "importlib-metadata"
-version = "3.4.0"
-description = "Read metadata from Python packages"
 category = "dev"
+description = "Read metadata from Python packages"
+marker = "python_version < \"3.8\""
+name = "importlib-metadata"
 optional = false
 python-versions = ">=3.6"
+version = "3.4.0"
 
 [package.dependencies]
-typing-extensions = {version = ">=3.6.4", markers = "python_version < \"3.8\""}
 zipp = ">=0.5"
 
+[package.dependencies.typing-extensions]
+python = "<3.8"
+version = ">=3.6.4"
+
 [package.extras]
 docs = ["sphinx", "jaraco.packaging (>=8.2)", "rst.linker (>=1.9)"]
-testing = ["pytest (>=3.5,!=3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "packaging", "pep517", "pyfakefs", "flufl.flake8", "pytest-black (>=0.3.7)", "pytest-mypy", "importlib-resources (>=1.3)"]
+testing = ["pytest (>=3.5,<3.7.3 || >3.7.3)", "pytest-checkdocs (>=1.2.3)", "pytest-flake8", "pytest-cov", "pytest-enabler", "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 = "dev"
+description = "iniconfig: brain-dead simple config-ini parsing"
+name = "iniconfig"
 optional = false
 python-versions = "*"
+version = "1.1.1"
 
 [[package]]
-name = "isort"
-version = "5.7.0"
-description = "A Python utility / library to sort Python imports."
 category = "dev"
+description = "A Python utility / library to sort Python imports."
+name = "isort"
 optional = false
 python-versions = ">=3.6,<4.0"
+version = "5.7.0"
 
 [package.extras]
+colors = ["colorama (>=0.4.3,<0.5.0)"]
 pipfile_deprecated_finder = ["pipreqs", "requirementslib"]
 requirements_deprecated_finder = ["pipreqs", "pip-api"]
-colors = ["colorama (>=0.4.3,<0.5.0)"]
 
 [[package]]
-name = "lazy-object-proxy"
-version = "1.4.3"
-description = "A fast and thorough lazy object proxy."
 category = "dev"
+description = "A fast and thorough lazy object proxy."
+name = "lazy-object-proxy"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "1.4.3"
 
 [[package]]
-name = "mccabe"
-version = "0.6.1"
-description = "McCabe checker, plugin for flake8"
 category = "dev"
+description = "McCabe checker, plugin for flake8"
+name = "mccabe"
 optional = false
 python-versions = "*"
+version = "0.6.1"
 
 [[package]]
-name = "more-itertools"
-version = "8.7.0"
+category = "dev"
 description = "More routines for operating on iterables, beyond itertools"
-category = "dev"
+name = "more-itertools"
 optional = false
 python-versions = ">=3.5"
+version = "8.7.0"
 
 [[package]]
-name = "mypy"
-version = "0.790"
-description = "Optional static typing for Python"
 category = "dev"
+description = "Optional static typing for Python"
+name = "mypy"
 optional = false
 python-versions = ">=3.5"
+version = "0.790"
 
 [package.dependencies]
 mypy-extensions = ">=0.4.3,<0.5.0"
@@ -120,158 +129,164 @@ typing-extensions = ">=3.7.4"
 dmypy = ["psutil (>=4.0)"]
 
 [[package]]
-name = "mypy-extensions"
-version = "0.4.3"
-description = "Experimental type system extensions for programs checked with the mypy typechecker."
 category = "dev"
+description = "Experimental type system extensions for programs checked with the mypy typechecker."
+name = "mypy-extensions"
 optional = false
 python-versions = "*"
+version = "0.4.3"
 
 [[package]]
-name = "packaging"
-version = "20.9"
-description = "Core utilities for Python packages"
 category = "dev"
+description = "Core utilities for Python packages"
+name = "packaging"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "20.9"
 
 [package.dependencies]
 pyparsing = ">=2.0.2"
 
 [[package]]
-name = "pluggy"
-version = "0.13.1"
-description = "plugin and hook calling mechanisms for python"
 category = "dev"
+description = "plugin and hook calling mechanisms for python"
+name = "pluggy"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "0.13.1"
 
 [package.dependencies]
-importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+[package.dependencies.importlib-metadata]
+python = "<3.8"
+version = ">=0.12"
 
 [package.extras]
 dev = ["pre-commit", "tox"]
 
 [[package]]
-name = "psutil"
-version = "5.8.0"
-description = "Cross-platform lib for process and system monitoring in Python."
 category = "main"
+description = "Cross-platform lib for process and system monitoring in Python."
+name = "psutil"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "5.8.0"
 
 [package.extras]
 test = ["ipaddress", "mock", "unittest2", "enum34", "pywin32", "wmi"]
 
 [[package]]
-name = "py"
-version = "1.10.0"
-description = "library with cross-python path, ini-parsing, io, code, log facilities"
 category = "dev"
+description = "library with cross-python path, ini-parsing, io, code, log facilities"
+name = "py"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+version = "1.10.0"
 
 [[package]]
-name = "pylint"
-version = "2.6.0"
-description = "python code static checker"
 category = "dev"
+description = "python code static checker"
+name = "pylint"
 optional = false
 python-versions = ">=3.5.*"
+version = "2.6.0"
 
 [package.dependencies]
 astroid = ">=2.4.0,<=2.5"
-colorama = {version = "*", markers = "sys_platform == \"win32\""}
+colorama = "*"
 isort = ">=4.2.5,<6"
 mccabe = ">=0.6,<0.7"
 toml = ">=0.7.1"
 
 [[package]]
-name = "pyparsing"
-version = "2.4.7"
-description = "Python parsing module"
 category = "dev"
+description = "Python parsing module"
+name = "pyparsing"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "2.4.7"
 
 [[package]]
-name = "pytest"
-version = "6.2.2"
-description = "pytest: simple powerful testing with Python"
 category = "dev"
+description = "pytest: simple powerful testing with Python"
+name = "pytest"
 optional = false
 python-versions = ">=3.6"
+version = "6.2.2"
 
 [package.dependencies]
-atomicwrites = {version = ">=1.0", markers = "sys_platform == \"win32\""}
+atomicwrites = ">=1.0"
 attrs = ">=19.2.0"
-colorama = {version = "*", markers = "sys_platform == \"win32\""}
-importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
+colorama = "*"
 iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<1.0.0a1"
 py = ">=1.8.2"
 toml = "*"
 
+[package.dependencies.importlib-metadata]
+python = "<3.8"
+version = ">=0.12"
+
 [package.extras]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
-name = "six"
-version = "1.15.0"
-description = "Python 2 and 3 compatibility utilities"
 category = "dev"
+description = "Python 2 and 3 compatibility utilities"
+name = "six"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "1.15.0"
 
 [[package]]
-name = "toml"
-version = "0.10.2"
-description = "Python Library for Tom's Obvious, Minimal Language"
 category = "dev"
+description = "Python Library for Tom's Obvious, Minimal Language"
+name = "toml"
 optional = false
 python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+version = "0.10.2"
 
 [[package]]
-name = "typed-ast"
-version = "1.4.2"
+category = "dev"
 description = "a fork of Python 2 and 3 ast modules with type comment support"
-category = "dev"
+name = "typed-ast"
 optional = false
 python-versions = "*"
+version = "1.4.2"
 
 [[package]]
-name = "typing-extensions"
-version = "3.7.4.3"
+category = "dev"
 description = "Backported and Experimental Type Hints for Python 3.5+"
-category = "dev"
+name = "typing-extensions"
 optional = false
 python-versions = "*"
+version = "3.7.4.3"
 
 [[package]]
-name = "wrapt"
-version = "1.12.1"
+category = "dev"
 description = "Module for decorators, wrappers and monkey patching."
-category = "dev"
+name = "wrapt"
 optional = false
 python-versions = "*"
+version = "1.12.1"
 
 [[package]]
-name = "zipp"
-version = "3.4.0"
-description = "Backport of pathlib-compatible object wrapper for zip files"
 category = "dev"
+description = "Backport of pathlib-compatible object wrapper for zip files"
+marker = "python_version < \"3.8\""
+name = "zipp"
 optional = false
 python-versions = ">=3.6"
+version = "3.4.0"
 
 [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"]
+testing = ["pytest (>=3.5,<3.7.3 || >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"]
 
 [metadata]
-lock-version = "1.1"
-python-versions = "^3.7"
 content-hash = "b3bd3798e1494ff11c901ea6d6c21d7d42daf0c58cf688edb702430bf977233b"
+lock-version = "1.0"
+python-versions = "^3.7"
 
 [metadata.files]
 astroid = [