Pin pytest to latest version 6.2.2

pyup-bot · pyup-bot · commit 2a2d7023cc0d · 2021-03-29T08:56:12.000+11:00
diff --git a/test-requirements.txt b/test-requirements.txt
@@ -1,2 +1,2 @@
-pytest
+pytest==6.2.2
 pytest-cov
