Bug fixes

1. Fixed colon bug #3105559
2. Fixed coding style of all the code.
3. Fixed the Widget wrapper bug.

First Drupal 9 compatible release.

Contains:
* Issue #3083478 by joy29: Replace entity_get_form_display() to getFormDisplay()
* Various deprecation fixes to be compatible with Drupal 8 and Drupal 9. Mostly in tests.
* Added test to make sure that a site loads with the module installed
* New bugs to fix later

Warning:
* This release works for Drupal 8.8+ & Drupal 9.

Enjoy!

Issue #3104453 by ChristianAdamski, slasher13: Throbber on Airbnb-styled map when loading
Issue #3092054 by Berdir: How to geocode the address field ?
Issue #3105647 by ChristianAdamski, Matus Grinvalsky, egontinno: Google Maps is not centered on GPS coordinates
Issue #3094126 by sathish.redcrackle, ChristianAdamski: Create an option to set Opacity for markers

This release consists of several bug fixes in the API.