diff --git a/poetry.lock b/poetry.lock
index 3e10bc6..e3d6f68 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1,11 +1,3 @@
-[[package]]
-name = "appdirs"
-version = "1.4.4"
-description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
-category = "dev"
-optional = false
-python-versions = "*"
-
 [[package]]
 name = "atomicwrites"
 version = "1.4.0"
@@ -145,11 +137,15 @@ pyinotify = {version = "*", markers = "sys_platform == \"linux\""}
 
 [[package]]
 name = "filelock"
-version = "3.0.12"
+version = "3.4.1"
 description = "A platform independent file lock."
 category = "dev"
 optional = false
-python-versions = "*"
+python-versions = ">=3.6"
+
+[package.extras]
+docs = ["furo (>=2021.8.17b43)", "sphinx (>=4.1)", "sphinx-autodoc-typehints (>=1.12)"]
+testing = ["covdefaults (>=1.2.0)", "coverage (>=4)", "pytest (>=4)", "pytest-cov", "pytest-timeout (>=1.4.2)"]
 
 [[package]]
 name = "idna"
@@ -171,8 +167,8 @@ python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 zipp = ">=0.5"
 
 [package.extras]
-docs = ["sphinx", "rst.linker"]
-testing = ["packaging", "pep517", "importlib-resources (>=1.3)"]
+testing = ["importlib-resources (>=1.3)", "pep517", "packaging"]
+docs = ["rst.linker", "sphinx"]
 
 [[package]]
 name = "importlib-resources"
@@ -186,7 +182,7 @@ python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,>=2.7"
 zipp = {version = ">=0.4", markers = "python_version < \"3.8\""}
 
 [package.extras]
-docs = ["sphinx", "rst.linker", "jaraco.packaging"]
+docs = ["jaraco.packaging", "rst.linker", "sphinx"]
 
 [[package]]
 name = "macfsevents"
@@ -245,6 +241,18 @@ importlib_metadata = {version = "*", markers = "python_version < \"3.8\""}
 toml = "*"
 zipp = {version = "*", markers = "python_version < \"3.8\""}
 
+[[package]]
+name = "platformdirs"
+version = "2.4.0"
+description = "A small Python module for determining appropriate platform-specific dirs, e.g. a \"user data dir\"."
+category = "dev"
+optional = false
+python-versions = ">=3.6"
+
+[package.extras]
+test = ["pytest-mock (>=3.6)", "pytest-cov (>=2.7)", "pytest (>=6)", "appdirs (==1.4.4)"]
+docs = ["sphinx-autodoc-typehints (>=1.12)", "proselint (>=0.10.2)", "furo (>=2021.7.5b38)", "Sphinx (>=4)"]
+
 [[package]]
 name = "pluggy"
 version = "0.13.1"
@@ -418,23 +426,22 @@ socks = ["PySocks (>=1.5.6,!=1.5.7,<2.0)"]
 
 [[package]]
 name = "virtualenv"
-version = "20.2.2"
+version = "20.16.2"
 description = "Virtual Python Environment builder"
 category = "dev"
 optional = false
-python-versions = "!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,>=2.7"
+python-versions = ">=3.6"
 
 [package.dependencies]
-appdirs = ">=1.4.3,<2"
 distlib = ">=0.3.1,<1"
-filelock = ">=3.0.0,<4"
+filelock = ">=3.2,<4"
 importlib-metadata = {version = ">=0.12", markers = "python_version < \"3.8\""}
 importlib-resources = {version = ">=1.0", markers = "python_version < \"3.7\""}
-six = ">=1.9.0,<2"
+platformdirs = ">=2,<3"
 
 [package.extras]
-docs = ["proselint (>=0.10.2)", "sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=19.9.0rc1)"]
-testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)", "pytest-xdist (>=1.31.0)", "packaging (>=20.0)", "xonsh (>=0.9.16)"]
+docs = ["proselint (>=0.10.2)", "sphinx (>=3)", "sphinx-argparse (>=0.2.5)", "sphinx-rtd-theme (>=0.4.3)", "towncrier (>=21.3)"]
+testing = ["coverage (>=4)", "coverage-enable-subprocess (>=1)", "flaky (>=3)", "packaging (>=20.0)", "pytest (>=4)", "pytest-env (>=0.6.2)", "pytest-freezegun (>=0.4.1)", "pytest-mock (>=2)", "pytest-randomly (>=1)", "pytest-timeout (>=1)"]
 
 [[package]]
 name = "wcwidth"
@@ -453,8 +460,8 @@ optional = false
 python-versions = ">=2.7"
 
 [package.extras]
-docs = ["sphinx", "jaraco.packaging (>=3.2)", "rst.linker (>=1.9)"]
-testing = ["pathlib2", "unittest2", "jaraco.itertools", "func-timeout"]
+testing = ["func-timeout", "jaraco.itertools", "unittest2", "pathlib2"]
+docs = ["rst.linker (>=1.9)", "jaraco.packaging (>=3.2)", "sphinx"]
 
 [metadata]
 lock-version = "1.1"
@@ -462,10 +469,6 @@ python-versions = "^3.6"
 content-hash = "3b16380d2ecaade0be00cf91c978bc3197ab58c90e16fc073c9fad6e8767f2a4"
 
 [metadata.files]
-appdirs = [
-    {file = "appdirs-1.4.4-py2.py3-none-any.whl", hash = "sha256:a841dacd6b99318a741b166adb07e19ee71a274450e68237b4650ca1055ab128"},
-    {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
-]
 atomicwrites = [
     {file = "atomicwrites-1.4.0-py2.py3-none-any.whl", hash = "sha256:6d1784dea7c0c8d4a5172b6c620f40b6e4cbfdf96d783691f2e1302a7b88e197"},
     {file = "atomicwrites-1.4.0.tar.gz", hash = "sha256:ae70396ad1a434f9c7046fd2dd196fc04b12f9e91ffb859164193be8b6168a7a"},
@@ -566,8 +569,8 @@ doit = [
     {file = "doit-0.32.0.tar.gz", hash = "sha256:323d0411e50a0babb945e2a639aa6e633fbb84a9f98086df0c880e739237750c"},
 ]
 filelock = [
-    {file = "filelock-3.0.12-py3-none-any.whl", hash = "sha256:929b7d63ec5b7d6b71b0fa5ac14e030b3f70b75747cef1b10da9b879fef15836"},
-    {file = "filelock-3.0.12.tar.gz", hash = "sha256:18d82244ee114f543149c66a6e0c14e9c4f8a1044b5cdaadd0f82159d6a6ff59"},
+    {file = "filelock-3.4.1-py3-none-any.whl", hash = "sha256:a4bc51381e01502a30e9f06dd4fa19a1712eab852b6fb0f84fd7cce0793d8ca3"},
+    {file = "filelock-3.4.1.tar.gz", hash = "sha256:0f12f552b42b5bf60dba233710bf71337d35494fc8bdd4fd6d9f6d082ad45e06"},
 ]
 idna = [
     {file = "idna-2.10-py2.py3-none-any.whl", hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"},
@@ -620,6 +623,10 @@ pep517 = [
     {file = "pep517-0.8.2-py2.py3-none-any.whl", hash = "sha256:576c480be81f3e1a70a16182c762311eb80d1f8a7b0d11971e5234967d7a342c"},
     {file = "pep517-0.8.2.tar.gz", hash = "sha256:8e6199cf1288d48a0c44057f112acf18aa5ebabbf73faa242f598fbe145ba29e"},
 ]
+platformdirs = [
+    {file = "platformdirs-2.4.0-py3-none-any.whl", hash = "sha256:8868bbe3c3c80d42f20156f22e7131d2fb321f5bc86a2a345375c6481a67021d"},
+    {file = "platformdirs-2.4.0.tar.gz", hash = "sha256:367a5e80b3d04d2428ffa76d33f124cf11e8fff2acdaa9b43d545f5c7d661ef2"},
+]
 pluggy = [
     {file = "pluggy-0.13.1-py2.py3-none-any.whl", hash = "sha256:966c145cd83c96502c3c3868f50408687b38434af77734af1e9ca461a4081d2d"},
     {file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
@@ -671,8 +678,8 @@ urllib3 = [
     {file = "urllib3-1.25.10.tar.gz", hash = "sha256:91056c15fa70756691db97756772bb1eb9678fa585d9184f24534b100dc60f4a"},
 ]
 virtualenv = [
-    {file = "virtualenv-20.2.2-py2.py3-none-any.whl", hash = "sha256:54b05fc737ea9c9ee9f8340f579e5da5b09fb64fd010ab5757eb90268616907c"},
-    {file = "virtualenv-20.2.2.tar.gz", hash = "sha256:b7a8ec323ee02fb2312f098b6b4c9de99559b462775bc8fe3627a73706603c1b"},
+    {file = "virtualenv-20.16.2-py2.py3-none-any.whl", hash = "sha256:635b272a8e2f77cb051946f46c60a54ace3cb5e25568228bd6b57fc70eca9ff3"},
+    {file = "virtualenv-20.16.2.tar.gz", hash = "sha256:0ef5be6d07181946891f5abc8047fda8bc2f0b4b9bf222c64e6e8963baee76db"},
 ]
 wcwidth = [
     {file = "wcwidth-0.2.5-py2.py3-none-any.whl", hash = "sha256:beb4802a9cebb9144e99086eff703a642a13d6a0052920003a230f3294bbe784"},