leftpad warning on 0.39

[kpp]

npm WARN deprecated left-pad@1.3.0: use String.prototype.padStart()

level@5.0.1 postinstall /home/jsclient/node_modules/level
opencollective-postinstall || exit 0

Thank you for using level!
If you rely on this package, please consider supporting our open collective:

https://opencollective.com/level/donate

[alanshaw]

Moving to datastore-level where this can be addressed.