Change the pytest verison to 7.0.0 pn pytest.ini and minver.txt

Author: Aalok Chhetri

pytest.ini

@@ -5,7 +5,7 @@
 # to check examples and documentation files that are not really tests.
 
 [pytest]
-minversion = 3.6
+minversion = 7.0.0
 
 testpaths = lib
 python_files = test_*.py

requirements/testing/minver.txt

@@ -10,4 +10,4 @@ pillow==8.0.0
 pyparsing==2.3.1
 python-dateutil==2.7
 fonttools==4.22.0
-pytest==6.2.0
+pytest==7.0.0