test: bump pytest version to support Python 3.10

Author: dtrodrigues

pyproject.toml

@@ -59,7 +59,7 @@ typing-extensions = "^4.0.1"
 [tool.poetry.dev-dependencies]
 ipython = "^7.2"
 # test
-pytest = "^5.0"
+pytest = "^6.2.5"
 pytest-cov = "^2.6"
 pytest-mock = "^2.0"
 codecov = "^2.0"