chore(release): 1.3.0 [skip ci]

# [1.3.0](https://gitlab.com/to-be-continuous/gcloud/compare/1.2.0...1.3.0) (2021-06-19)

### Features

* support multi-lines environment variables substitution ([88dd89ad](https://gitlab.com/to-be-continuous/gcloud/commit/88dd89ad5514eb56032093edc5cb81bdfb51df80))