Merge pull request #120 from Parsely/use_android_logging

Use `android.util.Log` for logging

Merge pull request #116 from Parsely/support_site_id_per_request

Support `siteId` per tracking request

Merge pull request #111 from Parsely/improve_javadoc

Improve code documentation

Merge pull request #77 from Parsely/flush_events_on_app_on_stop

Merge pull request #75 from Parsely/add_developers_metadata

Release: Bump version number (3.0.8)

chore: bump version to 3.0.7

chore: bump version to 3.0.6

chore: bump version to 3.0.5

Merge pull request #52 from Parsely/set_min_sdk_to_21

Set `minSdk` to 21, `compile` and `target` to 33