diff --git a/poetry.lock b/poetry.lock
index 6ae4526..5a001da 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -8,25 +8,25 @@ python-versions = "*"
 
 [[package]]
 name = "black"
-version = "20.8b1"
+version = "21.7b0"
 description = "The uncompromising code formatter."
 category = "dev"
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.6.2"
 
 [package.dependencies]
 appdirs = "*"
 click = ">=7.1.2"
 mypy-extensions = ">=0.4.3"
-pathspec = ">=0.6,<1"
+pathspec = ">=0.8.1,<1"
 regex = ">=2020.1.8"
-toml = ">=0.10.1"
-typed-ast = ">=1.4.0"
-typing-extensions = ">=3.7.4"
+tomli = ">=0.2.6,<2.0.0"
 
 [package.extras]
 colorama = ["colorama (>=0.4.3)"]
-d = ["aiohttp (>=3.3.2)", "aiohttp-cors"]
+d = ["aiohttp (>=3.6.0)", "aiohttp-cors (>=0.4.0)"]
+python2 = ["typed-ast (>=1.4.2)"]
+uvloop = ["uvloop (>=0.15.2)"]
 
 [[package]]
 name = "click"
@@ -97,19 +97,6 @@ category = "dev"
 optional = false
 python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
 
-[[package]]
-name = "pydantic"
-version = "1.7.3"
-description = "Data validation and settings management using python 3.6 type hinting"
-category = "main"
-optional = false
-python-versions = ">=3.6"
-
-[package.extras]
-dotenv = ["python-dotenv (>=0.10.4)"]
-email = ["email-validator (>=1.0.3)"]
-typing_extensions = ["typing-extensions (>=3.7.2)"]
-
 [[package]]
 name = "pyflakes"
 version = "2.2.0"
@@ -127,12 +114,12 @@ optional = false
 python-versions = "*"
 
 [[package]]
-name = "toml"
-version = "0.10.2"
-description = "Python Library for Tom's Obvious, Minimal Language"
+name = "tomli"
+version = "1.0.4"
+description = "A lil' TOML parser"
 category = "dev"
 optional = false
-python-versions = ">=2.6, !=3.0.*, !=3.1.*, !=3.2.*"
+python-versions = ">=3.6"
 
 [[package]]
 name = "typed-ast"
@@ -153,7 +140,7 @@ python-versions = "*"
 [metadata]
 lock-version = "1.1"
 python-versions = "^3.8"
-content-hash = "7056c74309d24574cb1939a8538b3b58552bb55913dd8072b960121c6e858772"
+content-hash = "6fe876bd26f6e5205026878c867aa481733db7f70f1da394a98381365905900f"
 
 [metadata.files]
 appdirs = [
@@ -161,7 +148,8 @@ appdirs = [
     {file = "appdirs-1.4.4.tar.gz", hash = "sha256:7d5d0167b2b1ba821647616af46a749d1c653740dd0d2415100fe26e27afdf41"},
 ]
 black = [
-    {file = "black-20.8b1.tar.gz", hash = "sha256:1c02557aa099101b9d21496f8a914e9ed2222ef70336404eeeac8edba836fbea"},
+    {file = "black-21.7b0-py3-none-any.whl", hash = "sha256:1c7aa6ada8ee864db745b22790a32f94b2795c253a75d6d9b5e439ff10d23116"},
+    {file = "black-21.7b0.tar.gz", hash = "sha256:c8373c6491de9362e39271630b65b964607bc5c79c83783547d76c839b3aa219"},
 ]
 click = [
     {file = "click-7.1.2-py2.py3-none-any.whl", hash = "sha256:dacca89f4bfadd5de3d7489b7c8a566eee0d3676333fbb50030263894c38c0dc"},
@@ -203,30 +191,6 @@ pycodestyle = [
     {file = "pycodestyle-2.6.0-py2.py3-none-any.whl", hash = "sha256:2295e7b2f6b5bd100585ebcb1f616591b652db8a741695b3d8f5d28bdc934367"},
     {file = "pycodestyle-2.6.0.tar.gz", hash = "sha256:c58a7d2815e0e8d7972bf1803331fb0152f867bd89adf8a01dfd55085434192e"},
 ]
-pydantic = [
-    {file = "pydantic-1.7.3-cp36-cp36m-macosx_10_9_x86_64.whl", hash = "sha256:c59ea046aea25be14dc22d69c97bee629e6d48d2b2ecb724d7fe8806bf5f61cd"},
-    {file = "pydantic-1.7.3-cp36-cp36m-manylinux1_i686.whl", hash = "sha256:a4143c8d0c456a093387b96e0f5ee941a950992904d88bc816b4f0e72c9a0009"},
-    {file = "pydantic-1.7.3-cp36-cp36m-manylinux2014_i686.whl", hash = "sha256:d8df4b9090b595511906fa48deda47af04e7d092318bfb291f4d45dfb6bb2127"},
-    {file = "pydantic-1.7.3-cp36-cp36m-manylinux2014_x86_64.whl", hash = "sha256:514b473d264671a5c672dfb28bdfe1bf1afd390f6b206aa2ec9fed7fc592c48e"},
-    {file = "pydantic-1.7.3-cp36-cp36m-win_amd64.whl", hash = "sha256:dba5c1f0a3aeea5083e75db9660935da90216f8a81b6d68e67f54e135ed5eb23"},
-    {file = "pydantic-1.7.3-cp37-cp37m-macosx_10_9_x86_64.whl", hash = "sha256:59e45f3b694b05a69032a0d603c32d453a23f0de80844fb14d55ab0c6c78ff2f"},
-    {file = "pydantic-1.7.3-cp37-cp37m-manylinux1_i686.whl", hash = "sha256:5b24e8a572e4b4c18f614004dda8c9f2c07328cb5b6e314d6e1bbd536cb1a6c1"},
-    {file = "pydantic-1.7.3-cp37-cp37m-manylinux2014_i686.whl", hash = "sha256:b2b054d095b6431cdda2f852a6d2f0fdec77686b305c57961b4c5dd6d863bf3c"},
-    {file = "pydantic-1.7.3-cp37-cp37m-manylinux2014_x86_64.whl", hash = "sha256:025bf13ce27990acc059d0c5be46f416fc9b293f45363b3d19855165fee1874f"},
-    {file = "pydantic-1.7.3-cp37-cp37m-win_amd64.whl", hash = "sha256:6e3874aa7e8babd37b40c4504e3a94cc2023696ced5a0500949f3347664ff8e2"},
-    {file = "pydantic-1.7.3-cp38-cp38-macosx_10_9_x86_64.whl", hash = "sha256:e682f6442ebe4e50cb5e1cfde7dda6766fb586631c3e5569f6aa1951fd1a76ef"},
-    {file = "pydantic-1.7.3-cp38-cp38-manylinux1_i686.whl", hash = "sha256:185e18134bec5ef43351149fe34fda4758e53d05bb8ea4d5928f0720997b79ef"},
-    {file = "pydantic-1.7.3-cp38-cp38-manylinux2014_i686.whl", hash = "sha256:f5b06f5099e163295b8ff5b1b71132ecf5866cc6e7f586d78d7d3fd6e8084608"},
-    {file = "pydantic-1.7.3-cp38-cp38-manylinux2014_x86_64.whl", hash = "sha256:24ca47365be2a5a3cc3f4a26dcc755bcdc9f0036f55dcedbd55663662ba145ec"},
-    {file = "pydantic-1.7.3-cp38-cp38-win_amd64.whl", hash = "sha256:d1fe3f0df8ac0f3a9792666c69a7cd70530f329036426d06b4f899c025aca74e"},
-    {file = "pydantic-1.7.3-cp39-cp39-macosx_10_9_x86_64.whl", hash = "sha256:f6864844b039805add62ebe8a8c676286340ba0c6d043ae5dea24114b82a319e"},
-    {file = "pydantic-1.7.3-cp39-cp39-manylinux1_i686.whl", hash = "sha256:ecb54491f98544c12c66ff3d15e701612fc388161fd455242447083350904730"},
-    {file = "pydantic-1.7.3-cp39-cp39-manylinux2014_i686.whl", hash = "sha256:ffd180ebd5dd2a9ac0da4e8b995c9c99e7c74c31f985ba090ee01d681b1c4b95"},
-    {file = "pydantic-1.7.3-cp39-cp39-manylinux2014_x86_64.whl", hash = "sha256:8d72e814c7821125b16f1553124d12faba88e85405b0864328899aceaad7282b"},
-    {file = "pydantic-1.7.3-cp39-cp39-win_amd64.whl", hash = "sha256:475f2fa134cf272d6631072554f845d0630907fce053926ff634cc6bc45bf1af"},
-    {file = "pydantic-1.7.3-py3-none-any.whl", hash = "sha256:38be427ea01a78206bcaf9a56f835784afcba9e5b88fbdce33bbbfbcd7841229"},
-    {file = "pydantic-1.7.3.tar.gz", hash = "sha256:213125b7e9e64713d16d988d10997dabc6a1f73f3991e1ff8e35ebb1409c7dc9"},
-]
 pyflakes = [
     {file = "pyflakes-2.2.0-py2.py3-none-any.whl", hash = "sha256:0d94e0e05a19e57a99444b6ddcf9a6eb2e5c68d3ca1e98e90707af8152c90a92"},
     {file = "pyflakes-2.2.0.tar.gz", hash = "sha256:35b2d75ee967ea93b55750aa9edbbf72813e06a66ba54438df2cfac9e3c27fc8"},
@@ -274,9 +238,9 @@ regex = [
     {file = "regex-2020.11.13-cp39-cp39-win_amd64.whl", hash = "sha256:a15f64ae3a027b64496a71ab1f722355e570c3fac5ba2801cafce846bf5af01d"},
     {file = "regex-2020.11.13.tar.gz", hash = "sha256:83d6b356e116ca119db8e7c6fc2983289d87b27b3fac238cfe5dca529d884562"},
 ]
-toml = [
-    {file = "toml-0.10.2-py2.py3-none-any.whl", hash = "sha256:806143ae5bfb6a3c6e736a764057db0e6a0e05e338b5630894a5f779cabb4f9b"},
-    {file = "toml-0.10.2.tar.gz", hash = "sha256:b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f"},
+tomli = [
+    {file = "tomli-1.0.4-py3-none-any.whl", hash = "sha256:0713b16ff91df8638a6a694e295c8159ab35ba93e3424a626dd5226d386057be"},
+    {file = "tomli-1.0.4.tar.gz", hash = "sha256:be670d0d8d7570fd0ea0113bd7bb1ba3ac6706b4de062cc4c952769355c9c268"},
 ]
 typed-ast = [
     {file = "typed_ast-1.4.2-cp35-cp35m-manylinux1_i686.whl", hash = "sha256:7703620125e4fb79b64aa52427ec192822e9f45d37d4b6625ab37ef403e1df70"},
diff --git a/pyproject.toml b/pyproject.toml
index f9cd53f..6367d71 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ python = "^3.8"
 
 [tool.poetry.dev-dependencies]
 mypy = "^0.790"
-black = "^20.8b1"
+black = "^21.7b0"
 flake8 = "^3.8.4"
 
 [build-system]