FROM 2.1.0 to 2.2.0

Search index fields description, resolution and message for CaseEntity now contain no more than 255 characters each.
- Please, run re-indexation for this entity using command:
```
  php app/console oro:search:reindex OroCaseBundle:CaseEntity --env=prod
```

FROM 2.0.0 to 2.1.0

Changed minimum required php version to 7.0
Updated dependency to fxpio/composer-asset-plugin composer plugin to version 1.3.
Composer updated to version 1.4.

    composer self-update
    composer global require "fxp/composer-asset-plugin"