sub(feat): make plugin compatible with Serverless v3.x
sub(feat): make plugin compatible with Serverless v3.x

Serverless Framework 3.0.0 removed support [1] for deprecated lifecycle hooks.
`deploy:compileEvents` was deprecated several versions prior and renamed to
`pacakge:compileEvents`.

[1] https://github.com/serverless/serverless/releases/v3.0.0

silvermine/serverless-plugin-external-sns-events