TSLint will be deprecated

[atarix83]

As described in this article https://medium.com/palantir/tslint-in-2019-1a144c2317a9 and highlighted on the github page https://github.com/palantir/tslint, TSLint will be deprecated in favor of ESLint.

We need to migrate to ESLint This can help with the migration https://github.com/typescript-eslint/tslint-to-eslint-config

[mwoodiupui]

yarn run lint now complains:

TSLint's support is discontinued and we're deprecating its support in Angular CLI. To opt-in using the community driven ESLint builder, see: https://github.com/angular-eslint/angular-eslint#migrating-an-angular-cli-project-from-codelyzer-and-tslint.

[alexandrevryghem]

@tdonohue this issue can be closed as it was already fixed in #1567

[tdonohue]

Thanks for the note, @alexandrevryghem

Closing as fixed by #1567