Refresh optional Python dependencies

Author: mdmintz

requirements.txt

@@ -131,7 +131,7 @@ pdfminer.six==20211012;python_version>="3.6"
 
 coverage==5.5;python_version<"3.6"
 coverage==6.2;python_version>="3.6" and python_version<"3.7"
-coverage==6.3;python_version>="3.7"
+coverage==6.3.1;python_version>="3.7"
 pytest-cov==2.12.1;python_version<"3.6"
 pytest-cov==3.0.0;python_version>="3.6"
 flake8==3.7.9;python_version<"3.5"

setup.py

@@ -256,7 +256,7 @@
         "coverage": [
             'coverage==5.5;python_version<"3.6"',
             'coverage==6.2;python_version>="3.6" and python_version<"3.7"',
-            'coverage==6.3;python_version>="3.7"',
+            'coverage==6.3.1;python_version>="3.7"',
             'pytest-cov==2.12.1;python_version<"3.6"',
             'pytest-cov==3.0.0;python_version>="3.6"',
         ],