Add Chrome 66+ notice to v2 breaking changes (#784)

#783

Author: oleksii-leonov

CHANGELOG.md

@@ -21,6 +21,7 @@
 - Migrated the production code to typescript
 - ** Breaking Change ** removed `version` from the public API
 - ** Breaking Change ** stopped supporting IE (internet explorer)
+- ** Breaking Change ** stopped supporting Chrome 49-65. Chrome 66+ required. For Chrome 49-65 support use version 1.15.2.
 - ** Breaking Change ** removed all code related to `accessToken` and Mapbox specific urls starting with `mapbox://`. Telemetry and tracking code was removed.
 - ** Breaking Change ** removed `baseApiUrl` as it was used only for Mapbox related urls
 - ** Breaking Change ** typescript typings have changed: