Removed pytest version pin from Tox.

.github/workflows/tox.yaml

@@ -18,7 +18,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -U codecov coveralls flake8 mypy pylint tox vulture
+          pip install -U codecov coveralls flake8 mypy pylint pytest tox vulture
       - name: Run Tox
         run: |
           tox

tox.ini

@@ -7,7 +7,7 @@ skip_missing_interpreters = true
 
 [testenv]
 deps =
-	test: pytest<6.0
+	test: pytest
 	test,cov: {[testenv:cov]deps}
 	test,py{36,37,38,39,310}-{type,mypy}: colorama
 	py{36,37,38,39,310}-{type,mypy}: {[testenv:mypy]deps}