[RELEASE] 2.9.20

2022-05-19 [DOCS] document how to release a new version [Jonas Eberle] (66ace37)
2022-05-19 [BUGFIX] fix GoogleMaps trackingObject duration property [Jonas Eberle] (fb36bb2)
2022-04-29 [SECURITY] upgrade npm packages [Jonas Eberle] (e227428)