Run all tests in GitHub Actions.

Author: veelo

.github/workflows/d.yml

@@ -26,7 +26,5 @@ jobs:
       run: |
         # Build the project, with its main file included, without unittests
         dub build --compiler=$DC
-        # Build and run tests, as defined by `unittest` configuration
-        # In this mode, `mainSourceFile` is excluded and `version (unittest)` are included
-        # See https://dub.pm/package-format-json.html#configurations
-        dub test --compiler=$DC
+        # Build and run tests.
+        rdmd runtests.d