chore: add support for pytest 7.0/7.1; relax pytest pin to <8

Author: theY4Kman

CHANGELOG.md

@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 
 ## [Unreleased]
+## Changed
+ - Add support for pytest versions 7.0 and 7.1
+ - Relax pytest version pin to allow all versions under 8.x
 
 
 ## [1.2.5] — 2021-08-23