Merge pull request #1250 from caitp/AsyncFixesFor988

src/async-generators/yield-star-async-next.case

...xpressions/async-generator/named-yield-star-async-next.js

...uage/expressions/async-generator/yield-star-async-next.js

...ns/class/async-gen-method-static-yield-star-async-next.js

...pressions/class/async-gen-method-yield-star-async-next.js

...ject/method-definition/async-gen-yield-star-async-next.js

...guage/statements/async-generator/yield-star-async-next.js

...ts/class/async-gen-method-static-yield-star-async-next.js

...tatements/class/async-gen-method-yield-star-async-next.js