Go1.16 support for several more stdlib packages#992

Merged

nevkontakte merged 6 commits intogopherjs:go1.16-stdlibfrom

nevkontakte:go1.16-stdlib

Mar 9, 2021

Commits on Mar 7, 2021

Support Go 1.13-1.16 changes in the sync package.
nevkontakte
committed
Fix math package conflict with natives introduced in Go 1.14.

visualfc
authored and
nevkontakte
committed

Commits on Mar 8, 2021

Commits on Mar 9, 2021

Update the comment to reference the correct issue.

nevkontakte
and
flimzy
authored