Bug fixes

Fix https://www.drupal.org/project/closest_zip_code/issues/3025531 by using zip codes close to requesting zipcode if requested code does not exist (https://github.com/dcycle/closest_zip_code/pull/3)

Added functionality to display updated node and minor fixes.

8.x-2.0 contains a list of new features. Some changes are incompatible to 8.x-1.x. For updating, please see the notes in the full release notes.

Contains fixes to two issues:

• Not compatible with latest Drupal 8 (critical)
• PostGreSQL database views are not accessible

Please be sure to clear you caches when testing this update on your site. This should be compatible with 8.6.x.

• Implementation of GeometryProviderInterface for \Geometry returning providers (GPX, KML, Geojson).
• Refactoring/ Better declaration of PhpDocs to admit the return of \Geometry for Providers implementing GeometryProviderInterface.
• Geocoder.schema.yml integrated with kmlfile and geojson providers
• Readme.md file updated with additional KML and GeoJson provider/formatter Geocoding functionalities.

Updated readme with install instructions.