* Add bundle size github workflow
This workflow implements a bundle-size monitoring utility for our repository to give better metrics on increases in bundle-sizes. I basically copied the configuration for the WordPress gutenberg project workflow and it utilizes the [`preactjs/compressed-size-action`](https://github.com/preactjs/compressed-size-action).
If this works well, it will replace our existing bundlesize implementation.
* remove bundlewatch and related scripts
* more lint job fixes
- remove build:ci because it was only used for bundlesize check. No need to build files for linting checks.
- add lint:ci npm script for doing build lint checks
- update travis job config to use new script and update title
* change name of workflow
Darren Ethier