feature/issue2-matrix-builds: removed python 3.5 from test runs

Author: megabotan

.github/workflows/code_checks.yaml

@@ -6,7 +6,7 @@ jobs:
   code_checks:
     strategy:
       matrix:
-        pyver: [ 3.5, 3.6, 3.7, 3.8, 3.9 ]
+        pyver: [ 3.6, 3.7, 3.8, 3.9 ]
         no-extensions: [ '', 'Y' ]
         os: [ ubuntu, macos, windows ]
       fail-fast: true