use pytest-xdist to speed up testing

Author: venthur

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 * Added sphinx documentation
 * Updated build system
+* Use pytest-xdist to speed up testing
 
 ## [3.2.0] - 2021-08-07
 

requirements-dev.txt

@@ -1,6 +1,7 @@
 sphinx==3.5.3
 pytest==6.2.4
 pytest-cov==2.12.1
+pytest-xdist==2.3.0
 flake8==3.9.2
 wheel==0.36.2
 twine==3.4.2

setup.cfg

@@ -4,6 +4,7 @@ addopts =
     --cov=tests
     --cov-report=term-missing:skip-covered
     --cov-report=html
+    --numprocesses=auto
 
 [flake8]
 exclude = venv,build,docs