add innerTube as primary videoInfo endpoint

- drop videoInfo.genreUrl since it's always empty
- bump ts target to ES2021 for Promise.any
- fix mocks to return err: false
- get maxResThumbnail from static endpoint

DatabaseSchema.md

@@ -126,7 +126,6 @@
 | channelID | TEXT | not null |
 | title | TEXT | not null |
 | published | REAL | not null |
-| genreUrl | TEXT | not null |
 
 | index | field |
 | -- | :--: |