improve support for anyframe and anyframe->T

* add implicit cast from `*@Frame(func)` to `anyframe->T` or `anyframe`.
 * add implicit cast from `anyframe->T` to `anyframe`.
 * `resume` works on `anyframe->T` and `anyframe` types.
dbdc4d62d0Andrew Kelley committed on 7/29/2019, 11:32:49 PMparentee64a22
5 files changedLine totals unavailable