Make save/restore logs akin (actions#509)

- Print primary key when saving cache

Upgrade @actions/cache to 1.0.4 (actions#451)

Upgrade @actions/cache to 1.0.4 (actions#451)

Merge pull request actions#424 from actions/dhadka/upload-chunk-size

Adds input for upload chunk size

Merge pull request actions#398 from smorimoto/release-2.1.1

Prepare 2.1.1

Merge pull request actions#383 from actions/dhadka/cache-1.0.1

Upgrade to cache 1.0.1

Merge pull request actions#329 from actions/aiyan/v2-release-doc

Update readme and examples to use v2

Merge pull request actions#308 from actions/aiyan/v1-release

Cherry-pick commits for v1

Move v1 to v1.1.2

Release v1.1.2