refactor(upgrade): deprecate VERSION export

users should use the entry from `upgrade/static`.

DEPRECATED: `VERSION` from `@angular/upgrade` is deprecated. Please use the entry from `@angular/upgrade/static` instead.

Author: JeanMeche

packages/upgrade/public_api.ts

@@ -9,6 +9,8 @@
 /**
  * @module
  * @description
+ *
+ * @deprecated Use the entry from `@angular/upgrade/static` instead.
  * Entry point for all public APIs of this package. allowing
  * Angular 1 and Angular 2+ to run side by side in the same application.
  */