test(__framework__): setup Prism using setupTestFrameworkScriptFile
test(PrismCode): add simple test case for it
fix(PrismCode): async option should be truely async

* see https://github.com/LeaVerou/prism/issues/392
test(PrismCode): add test for hightlight
Merge pull request #1 from tomchentw/feature/add-test-for-PrismCode

feature/add test for prism code