diff --git a/poetry.lock b/poetry.lock
index 02973b3..f121b4a 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -44,12 +44,15 @@ optional = false
 python-versions = "*"
 
 [[package]]
-name = "chardet"
-version = "4.0.0"
-description = "Universal encoding detector for Python 2 and 3"
+name = "charset-normalizer"
+version = "2.0.3"
+description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*"
+python-versions = ">=3.5.0"
+
+[package.extras]
+unicode_backport = ["unicodedata2"]
 
 [[package]]
 name = "colorama"
@@ -224,15 +227,15 @@ typing-extensions = {version = ">=3.7.4.0", markers = "python_version < \"3.8\""
 
 [[package]]
 name = "idna"
-version = "2.10"
+version = "3.2"
 description = "Internationalized Domain Names in Applications (IDNA)"
 category = "dev"
 optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
+python-versions = ">=3.5"
 
 [[package]]
 name = "importlib-metadata"
-version = "4.6.0"
+version = "4.6.1"
 description = "Read metadata from Python packages"
 category = "dev"
 optional = false
@@ -486,21 +489,21 @@ python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*"
 
 [[package]]
 name = "requests"
-version = "2.25.1"
+version = "2.26.0"
 description = "Python HTTP for Humans."
 category = "dev"
 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.dependencies]
 certifi = ">=2017.4.17"
-chardet = ">=3.0.2,<5"
-idna = ">=2.5,<3"
+charset-normalizer = {version = ">=2.0.0,<2.1.0", markers = "python_version >= \"3\""}
+idna = {version = ">=2.5,<4", markers = "python_version >= \"3\""}
 urllib3 = ">=1.21.1,<1.27"
 
 [package.extras]
-security = ["pyOpenSSL (>=0.14)", "cryptography (>=1.3.4)"]
 socks = ["PySocks (>=1.5.6,!=1.5.7)", "win-inet-pton"]
+use_chardet_on_py3 = ["chardet (>=3.0.2,<5)"]
 
 [[package]]
 name = "requests-mock"
@@ -556,7 +559,7 @@ pbr = ">=2.0.0,<2.1.0 || >2.1.0"
 
 [[package]]
 name = "testfixtures"
-version = "6.17.1"
+version = "6.18.0"
 description = "A collection of helpers and mock objects for unit tests and doc tests."
 category = "dev"
 optional = false
@@ -638,9 +641,9 @@ certifi = [
     {file = "certifi-2021.5.30-py2.py3-none-any.whl", hash = "sha256:50b1e4f8446b06f41be7dd6338db18e0990601dce795c2b1686458aa7e8fa7d8"},
     {file = "certifi-2021.5.30.tar.gz", hash = "sha256:2bbf76fd432960138b3ef6dda3dde0544f27cbf8546c458e60baf371917ba9ee"},
 ]
-chardet = [
-    {file = "chardet-4.0.0-py2.py3-none-any.whl", hash = "sha256:f864054d66fd9118f2e67044ac8981a54775ec5b67aed0441892edb553d21da5"},
-    {file = "chardet-4.0.0.tar.gz", hash = "sha256:0d6f53a15db4120f2b08c94f11e7d93d2c911ee118b6b30a04ec3ee8310179fa"},
+charset-normalizer = [
+    {file = "charset-normalizer-2.0.3.tar.gz", hash = "sha256:c46c3ace2d744cfbdebceaa3c19ae691f53ae621b39fd7570f59d14fb7f2fd12"},
+    {file = "charset_normalizer-2.0.3-py3-none-any.whl", hash = "sha256:88fce3fa5b1a84fdcb3f603d889f723d1dd89b26059d0123ca435570e848d5e1"},
 ]
 colorama = [
     {file = "colorama-0.4.4-py2.py3-none-any.whl", hash = "sha256:9f47eda37229f68eee03b24b9748937c7dc3868f906e8ba69fbcbdd3bc5dc3e2"},
@@ -749,12 +752,12 @@ gitpython = [
     {file = "GitPython-3.1.18.tar.gz", hash = "sha256:b838a895977b45ab6f0cc926a9045c8d1c44e2b653c1fcc39fe91f42c6e8f05b"},
 ]
 idna = [
-    {file = "idna-2.10-py2.py3-none-any.whl", hash = "sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0"},
-    {file = "idna-2.10.tar.gz", hash = "sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6"},
+    {file = "idna-3.2-py3-none-any.whl", hash = "sha256:14475042e284991034cb48e06f6851428fb14c4dc953acd9be9a5e95c7b6dd7a"},
+    {file = "idna-3.2.tar.gz", hash = "sha256:467fbad99067910785144ce333826c71fb0e63a425657295239737f7ecd125f3"},
 ]
 importlib-metadata = [
-    {file = "importlib_metadata-4.6.0-py3-none-any.whl", hash = "sha256:c6513572926a96458f8c8f725bf0e00108fba0c9583ade9bd15b869c9d726e33"},
-    {file = "importlib_metadata-4.6.0.tar.gz", hash = "sha256:4a5611fea3768d3d967c447ab4e93f567d95db92225b43b7b238dbfb855d70bb"},
+    {file = "importlib_metadata-4.6.1-py3-none-any.whl", hash = "sha256:9f55f560e116f8643ecf2922d9cd3e1c7e8d52e683178fecd9d08f6aa357e11e"},
+    {file = "importlib_metadata-4.6.1.tar.gz", hash = "sha256:079ada16b7fc30dfbb5d13399a5113110dab1aa7c2bc62f66af75f0b717c8cac"},
 ]
 iniconfig = [
     {file = "iniconfig-1.1.1-py2.py3-none-any.whl", hash = "sha256:011e24c64b7f47f6ebd835bb12a743f2fbe9a26d4cecaa7f53bc4f35ee9da8b3"},
@@ -899,8 +902,8 @@ pyyaml = [
     {file = "PyYAML-5.4.1.tar.gz", hash = "sha256:607774cbba28732bfa802b54baa7484215f530991055bb562efbed5b2f20a45e"},
 ]
 requests = [
-    {file = "requests-2.25.1-py2.py3-none-any.whl", hash = "sha256:c210084e36a42ae6b9219e00e48287def368a26d03a048ddad7bfee44f75871e"},
-    {file = "requests-2.25.1.tar.gz", hash = "sha256:27973dd4a904a4f13b263a19c866c13b92a39ed1c964655f025f3f8d3d75b804"},
+    {file = "requests-2.26.0-py2.py3-none-any.whl", hash = "sha256:6c1246513ecd5ecd4528a0906f910e8f0f9c6b8ec72030dc9fd154dc1a6efd24"},
+    {file = "requests-2.26.0.tar.gz", hash = "sha256:b8aa58f8cf793ffd8782d3d8cb19e66ef36f7aba4353eec859e74678b01b07a7"},
 ]
 requests-mock = [
     {file = "requests-mock-1.9.3.tar.gz", hash = "sha256:8d72abe54546c1fc9696fa1516672f1031d72a55a1d66c85184f972a24ba0eba"},
@@ -923,8 +926,8 @@ stevedore = [
     {file = "stevedore-3.3.0.tar.gz", hash = "sha256:3a5bbd0652bf552748871eaa73a4a8dc2899786bc497a2aa1fcb4dcdb0debeee"},
 ]
 testfixtures = [
-    {file = "testfixtures-6.17.1-py2.py3-none-any.whl", hash = "sha256:9ed31e83f59619e2fa17df053b241e16e0608f4580f7b5a9333a0c9bdcc99137"},
-    {file = "testfixtures-6.17.1.tar.gz", hash = "sha256:5ec3a0dd6f71cc4c304fbc024a10cc293d3e0b852c868014b9f233203e149bda"},
+    {file = "testfixtures-6.18.0-py2.py3-none-any.whl", hash = "sha256:9bddf79b2dddb36420a20c25a65c827a8e7398c6ed4e2c75c2697857cb006be9"},
+    {file = "testfixtures-6.18.0.tar.gz", hash = "sha256:d4bd1c4f90eac90a73e1bdc59c31d03943f218d687f3c5a09e48478841a8af5f"},
 ]
 toml = [
     {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},