Drop support for netstandard 1.2 tests on Unix-like OS [skip ci]

Author: AlexNDRmac

.github/workflows/build_and_test.yml

@@ -30,10 +30,8 @@ jobs:
       matrix:
         include:
           # Ubuntu
-          - { name: 'Linux .NET Core 3',    os: ubuntu-22.04,   framework: 'netcoreapp3.1' }
           - { name: 'Linux .NET 5',         os: ubuntu-22.04,   framework: 'net5' }
           # macOs
-          - { name: 'macOS .NET Core 3',    os: macOS-latest,   framework: 'netcoreapp3.1' }
           - { name: 'macOS .NET 5',         os: macOS-latest,   framework: 'net5' }
           # Windows
           - { name: 'Windows .NET Core 3',  os: windows-latest, framework: 'netcoreapp3.1' }

codecov.yml

@@ -1,7 +1,7 @@
 codecov:
   notify:
     require_ci_to_pass: yes # require the build to pass before submitting notifications
-    after_n_builds: 7       # how many build to wait for before submitting notifications, therefore skipping status checks
+    after_n_builds: 5       # how many build to wait for before submitting notifications, therefore skipping status checks
 
 coverage:
   precision: 2