Pin pytest-cov to latest version 2.12.1

pyup-bot · pyup-bot · commit eed1751484e4 · 2021-08-14T00:01:09.000+10:00
diff --git a/test-requirements.txt b/test-requirements.txt
@@ -1,3 +1,3 @@
 pytest==6.2.4
-pytest-cov
+pytest-cov==2.12.1
 pytest-catchlog==1.2.2
