Update Here Geocode and Reverse Geocode Provider to GS7 (v7)

[SCatrinh]

Here.com has released their GS7 (v7) API.

We are currently using here-provider 0.6.0 that is using v6.2 endpoints. We are updating to use Here's GS7 endpoints per a conversation with our Here.com rep. Our rep let us know that Here.com intends to drop support for our current endpoints (v6.2) and that we should switch to the new GS7 endpoints.

Note: with the change to GS7 the shape of the responses from here has completely changed Update was made using the following Here.com Documentation.

Here Migration Docs https://www.here.com/docs/bundle/geocoding-and-search-api-migration-guide/page/migration-geocoder/README.html

Geo-code Endpoint Docs https://www.here.com/docs/bundle/geocoding-and-search-api-developer-guide/page/topics/endpoint-geocode-brief.html

Reverse Geo-code Endpoint Docs https://www.here.com/docs/bundle/geocoding-and-search-api-developer-guide/page/topics/endpoint-reverse-geocode-brief.html

Here API Reference https://www.here.com/docs/bundle/geocoding-and-search-api-v7-api-reference/page/index.html