update to TypeScript v3.8-rc#57774

Closed

mshustov wants to merge 21 commits intoelastic:masterfrom

mshustov:ts-3.8-rc

Commits on Feb 20, 2020

Commits on Mar 2, 2020

Commits on Mar 23, 2020

Merge branch 'master' into ts-3.8-rc
mshustov
committed