deploy-appengine v0.4.0

Features

• Add flags input and tests (#57) (8aae463)

Bug Fixes

• deps: update dependency @actions/github to v4 (#48) (22930b1)
• deps: update dependency @actions/github to v5 (#52) (c14ade5)
• deps: update dependency js-base64 to v3 (#49) (cc49642)
• deps: update dependency tmp to ^0.2.0 (#41) (a777a6c)