Add type hints for "strings" folder (#2882)

* Add type hints for strings/ folder

* Rerun other checks

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>

Dmytro Litvinov committed 5y ago

000cedc07f1065282acd7e25add4d2847fe08391

Parent: f36a2f6

Committed by GitHub <noreply@github.com> on 10/6/2020, 8:31:15 AM