Release v2.7.0 (natario1#1040)

* Release v2.7.0

* Improve docs

Release v2.6.4 (natario1#954)

Release v2.6.3 (natario1#912)

Release v2.6.2 (natario1#794)

* Remove codecov token

* Release v2.6.2

Release v2.6.1 (natario1#744)

Release v2.6.0 (natario1#725)

Release v2.5.0 (natario1#708)

Release v2.4.0 (natario1#662)

Fix bugs (natario1#630)

* Use CopyOnWrite set in GL preview (Fix natario1#626)

* Demo app - do not add frame processor when opening (Fix natario1#628)

* Add comments

* Create EngineThread annotation

* Fix onVideoResult crash for snapshots

* Catch IllegalStateExceptions in applyRepeatingRequestBuilder

* Add exception to LOG.e

* Add changelog

* Release v2.3.1

* Move snapshot logs to verbose

Release v2.3.0 (natario1#608)