build(turf): update to version 6.5.0

[lisabaut]

Description

This is a clean up PR which happend due to the dependency update PR for eslint-plugin-import

Eslint correctly pointed to non existend types from turf.
Updating the libs to version 6.5.0 helped.

This PR includes also two refactorings:

• replace convertDistance with convertLength (convertDistance was removed in version 5.0.0)
• point to the file which contains the Feature type

Please see that the tests are failing!
This is not due to this PR but coming from this commit here instead:
https://github.com/react-native-mapbox-gl/maps/actions/runs/1461266314
=> rebased with master again

Checklist

• I have tested this on a device/simulator for each compatible OS
• I formatted JS and TS files with running yarn lint:fix in the root folder
• I updated the documentation with running yarn generate in the root folder
• I mentioned this change in CHANGELOG.md
• I updated the typings files (index.d.ts)
• I added/ updated a sample (/example)

Screenshot OR Video

[ferdicus]

hi @lisabaut, thanks for your contribution.

Looks good to me, feel free to merge 👍🏿