[android] updated changelog for 6.0.0-beta.6

[ios] Bump podspecs for ios-v4.0.0-beta.3

[android] reverted release configuration for 6.0.0-beta.5

[android] - bump snapshot version

[android] - update changelog for v6.0.0-beta.4 (mapbox#11485)

[ios] Bump podspecs for ios-v3.7.6

Bump Mapbox GL Native

Bump version.

mapbox-gl-native @ eeadec3

[android] release configuration for v6.0.0-beta.3

[android] - reset release configuration

[ios] Podspec bump 4.0.0-beta.2 (mapbox#11263)

* [ios] Podspec bump 4.0.0-beta.2

* [ios] Improved change log messaging.