refs: https://github.com/TryGhost/Toolbox/issues/188
- some of our older packages used a pattern for linting which missed using test config for linting tests
- we need this to be consistent so that we can add more eslint rules for testing
- two packages also didn't use the lib pattern, which made the lint pattern error - so this was fixed as well
- because of how the npm scripts were set up, we were running the full
Admin integration tests during the unit tests phase of CI
- this commit renames the majority of `test` to `test:unit` in the
package.json files, and aliases `test` to `test:unit`
- special packages like Admin have no-op'd `test:unit` scripts so we
don't end up running its tests
