* Update ember-cli to ~3.20

* Remove bad optional-feature

* Remove ember-fetch dep

* re-install ember-fetch

* update model fragments pr

* update ember model fragments correct package name

* update ember composable helpers to solve array helper error

* update ember-concurrency

* add back engine dependencies, automatically removed during ember-cli-upgrade

* make author-form-options component js file otherwise error

* for now comment out withTestWaiter

* add eslint-node and fix if not with unless in templates

* fix linting for tab index of false is now -1 and add type button to all buttons without types

* fix href errors for linting, likely have to come back and fix

* using eslint fix flag to fix all this.gets

* ember modules codemode removed files that had module twice, will fix in next commit

* finish codemode ember-data-codemod needed to rename const model

* more this.get removal codemode did not work

* cont...