diff --git a/poetry.lock b/poetry.lock
index 8ef126fa..c2abf56c 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -223,6 +223,14 @@ zipp = ">=0.5"
 docs = ["sphinx", "rst.linker"]
 testing = ["packaging", "importlib-resources"]
 
+[[package]]
+category = "dev"
+description = "iniconfig: brain-dead simple config-ini parsing"
+name = "iniconfig"
+optional = false
+python-versions = "*"
+version = "1.0.1"
+
 [[package]]
 category = "dev"
 description = "A Python utility / library to sort Python imports."
@@ -357,14 +365,6 @@ markdown = ">=3.2"
 mkdocs = ">=1.0"
 pymdown-extensions = ">=6.3"
 
-[[package]]
-category = "dev"
-description = "More routines for operating on iterables, beyond itertools"
-name = "more-itertools"
-optional = false
-python-versions = ">=3.5"
-version = "8.2.0"
-
 [[package]]
 category = "dev"
 description = "Optional static typing for Python"
@@ -450,7 +450,7 @@ description = "library with cross-python path, ini-parsing, io, code, log facili
 name = "py"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-version = "1.8.1"
+version = "1.9.0"
 
 [[package]]
 category = "dev"
@@ -519,24 +519,24 @@ description = "pytest: simple powerful testing with Python"
 name = "pytest"
 optional = false
 python-versions = ">=3.5"
-version = "5.3.5"
+version = "6.1.0"
 
 [package.dependencies]
 atomicwrites = ">=1.0"
 attrs = ">=17.4.0"
 colorama = "*"
-more-itertools = ">=4.0.0"
+iniconfig = "*"
 packaging = "*"
 pluggy = ">=0.12,<1.0"
-py = ">=1.5.0"
-wcwidth = "*"
+py = ">=1.8.2"
+toml = "*"
 
 [package.dependencies.importlib-metadata]
 python = "<3.8"
 version = ">=0.12"
 
 [package.extras]
-checkqa-mypy = ["mypy (v0.761)"]
+checkqa_mypy = ["mypy (0.780)"]
 testing = ["argcomplete", "hypothesis (>=3.56)", "mock", "nose", "requests", "xmlschema"]
 
 [[package]]
@@ -698,14 +698,6 @@ brotli = ["brotlipy (>=0.6.0)"]
 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"
-name = "wcwidth"
-optional = false
-python-versions = "*"
-version = "0.1.8"
-
 [[package]]
 category = "dev"
 description = "Backport of pathlib-compatible object wrapper for zip files"
@@ -721,6 +713,7 @@ testing = ["jaraco.itertools", "func-timeout"]
 
 [metadata]
 content-hash = "2b727851846408766afb773a03cef7946f566c0817623186d8bcfed2e9d62557"
+lock-version = "1.0"
 python-versions = "^3.6"
 
 [metadata.files]
@@ -835,6 +828,10 @@ importlib-metadata = [
     {file = "importlib_metadata-1.5.0-py2.py3-none-any.whl", hash = "sha256:b97607a1a18a5100839aec1dc26a1ea17ee0d93b20b0f008d80a5a050afb200b"},
     {file = "importlib_metadata-1.5.0.tar.gz", hash = "sha256:06f5b3a99029c7134207dd882428a66992a9de2bef7c2b699b5641f9886c3302"},
 ]
+iniconfig = [
+    {file = "iniconfig-1.0.1-py3-none-any.whl", hash = "sha256:80cf40c597eb564e86346103f609d74efce0f6b4d4f30ec8ce9e2c26411ba437"},
+    {file = "iniconfig-1.0.1.tar.gz", hash = "sha256:e5f92f89355a67de0595932a6c6c02ab4afddc6fcdc0bfc5becd0d60884d3f69"},
+]
 isort = [
     {file = "isort-4.3.21-py2.py3-none-any.whl", hash = "sha256:6e811fcb295968434526407adb8796944f1988c5b65e8139058f2014cbe100fd"},
     {file = "isort-4.3.21.tar.gz", hash = "sha256:54da7e92468955c4fceacd0c86bd0ec997b0e1ee80d97f67c35a78b719dccab1"},
@@ -905,10 +902,6 @@ mkdocs-material = [
     {file = "mkdocs-material-4.6.3.tar.gz", hash = "sha256:1d486635b03f5a2ec87325842f7b10c7ae7daa0eef76b185572eece6a6ea212c"},
     {file = "mkdocs_material-4.6.3-py2.py3-none-any.whl", hash = "sha256:7f3afa0a09c07d0b89a6a9755fdb00513aee8f0cec3538bb903325c80f66f444"},
 ]
-more-itertools = [
-    {file = "more-itertools-8.2.0.tar.gz", hash = "sha256:b1ddb932186d8a6ac451e1d95844b382f55e12686d51ca0c68b6f61f2ab7a507"},
-    {file = "more_itertools-8.2.0-py3-none-any.whl", hash = "sha256:5dd8bcf33e5f9513ffa06d5ad33d78f31e1931ac9a18f33d37e77a180d393a7c"},
-]
 mypy = [
     {file = "mypy-0.761-cp35-cp35m-macosx_10_6_x86_64.whl", hash = "sha256:7f672d02fffcbace4db2b05369142e0506cdcde20cea0e07c7c2171c4fd11dd6"},
     {file = "mypy-0.761-cp35-cp35m-manylinux1_x86_64.whl", hash = "sha256:87c556fb85d709dacd4b4cb6167eecc5bbb4f0a9864b69136a0d4640fdc76a36"},
@@ -946,8 +939,8 @@ pluggy = [
     {file = "pluggy-0.13.1.tar.gz", hash = "sha256:15b2acde666561e1298d71b523007ed7364de07029219b604cf808bfa1c765b0"},
 ]
 py = [
-    {file = "py-1.8.1-py2.py3-none-any.whl", hash = "sha256:c20fdd83a5dbc0af9efd622bee9a5564e278f6380fffcacc43ba6f43db2813b0"},
-    {file = "py-1.8.1.tar.gz", hash = "sha256:5e27081401262157467ad6e7f851b7aa402c5852dbcb3dae06768434de5752aa"},
+    {file = "py-1.9.0-py2.py3-none-any.whl", hash = "sha256:366389d1db726cd2fcfc79732e75410e5fe4d31db13692115529d34069a043c2"},
+    {file = "py-1.9.0.tar.gz", hash = "sha256:9ca6883ce56b4e8da7e79ac18787889fa5206c79dcc67fb065376cd2fe03f342"},
 ]
 pycodestyle = [
     {file = "pycodestyle-2.5.0-py2.py3-none-any.whl", hash = "sha256:95a2219d12372f05704562a14ec30bc76b05a5b297b21a5dfe3f6fac3491ae56"},
@@ -986,8 +979,8 @@ pyparsing = [
     {file = "pyparsing-2.4.6.tar.gz", hash = "sha256:4c830582a84fb022400b85429791bc551f1f4871c33f23e44f353119e92f969f"},
 ]
 pytest = [
-    {file = "pytest-5.3.5-py3-none-any.whl", hash = "sha256:ff615c761e25eb25df19edddc0b970302d2a9091fbce0e7213298d85fb61fef6"},
-    {file = "pytest-5.3.5.tar.gz", hash = "sha256:0d5fe9189a148acc3c3eb2ac8e1ac0742cb7618c084f3d228baaec0c254b318d"},
+    {file = "pytest-6.1.0-py3-none-any.whl", hash = "sha256:1cd09785c0a50f9af72220dd12aa78cfa49cbffc356c61eab009ca189e018a33"},
+    {file = "pytest-6.1.0.tar.gz", hash = "sha256:d010e24666435b39a4cf48740b039885642b6c273a3f77be3e7e03554d2806b7"},
 ]
 pytest-asyncio = [
     {file = "pytest-asyncio-0.10.0.tar.gz", hash = "sha256:9fac5100fd716cbecf6ef89233e8590a4ad61d729d1732e0a96b84182df1daaf"},
@@ -1034,6 +1027,7 @@ regex = [
     {file = "regex-2020.2.20.tar.gz", hash = "sha256:9e9624440d754733eddbcd4614378c18713d2d9d0dc647cf9c72f64e39671be5"},
 ]
 requests = [
+    {file = "requests-2.23.0-py2.7.egg", hash = "sha256:5d2d0ffbb515f39417009a46c14256291061ac01ba8f875b90cad137de83beb4"},
     {file = "requests-2.23.0-py2.py3-none-any.whl", hash = "sha256:43999036bfa82904b6af1d99e4882b560e5e2c68e5c4b0aa03b655f3d7d73fee"},
     {file = "requests-2.23.0.tar.gz", hash = "sha256:b3f43d496c6daba4493e7c431722aeb7dbc6288f52a6e04e7b6023b0247817e6"},
 ]
@@ -1100,10 +1094,6 @@ urllib3 = [
     {file = "urllib3-1.25.8-py2.py3-none-any.whl", hash = "sha256:2f3db8b19923a873b3e5256dc9c2dedfa883e33d87c690d9c7913e1f40673cdc"},
     {file = "urllib3-1.25.8.tar.gz", hash = "sha256:87716c2d2a7121198ebcb7ce7cccf6ce5e9ba539041cfbaeecfb641dc0bf6acc"},
 ]
-wcwidth = [
-    {file = "wcwidth-0.1.8-py2.py3-none-any.whl", hash = "sha256:8fd29383f539be45b20bd4df0dc29c20ba48654a41e661925e612311e9f3c603"},
-    {file = "wcwidth-0.1.8.tar.gz", hash = "sha256:f28b3e8a6483e5d49e7f8949ac1a78314e740333ae305b4ba5defd3e74fb37a8"},
-]
 zipp = [
     {file = "zipp-3.1.0-py3-none-any.whl", hash = "sha256:aa36550ff0c0b7ef7fa639055d797116ee891440eac1a56f378e2d3179e0320b"},
     {file = "zipp-3.1.0.tar.gz", hash = "sha256:c599e4d75c98f6798c509911d08a22e6c021d074469042177c8c86fb92eefd96"},