feat: support GITHUB_REF_NAME & GITHUB_REF_TYPE (#1142)

* feat: support `_REF_NAME` & `_REF_TYPE`

* chore: fix `step_test::TestSetupEnv`

* fix: logic & test

* test: delete `GITHUB_REF_NAME`, `GITHUB_REF_TYPE`

pkg/runner/step_test.go

@@ -154,6 +154,8 @@ func TestSetupEnv(t *testing.T) {
 
 	// These are commit or system specific
 	delete((env), "GITHUB_REF")
+	delete((env), "GITHUB_REF_NAME")
+	delete((env), "GITHUB_REF_TYPE")
 	delete((env), "GITHUB_SHA")
 	delete((env), "GITHUB_WORKSPACE")
 	delete((env), "GITHUB_REPOSITORY")