Issue 367 / Switch out tslint for eslint

[timagixe]

Closes #367

[ryanluker]

@timagixe Looking great so far, thanks for tackling this! I have approved the PR to run against the CI system and also provided a few bits of feedback above.

(we might also need to update the npm scripts to include a few different eslint options based on the CI output🤔) https://github.com/ryanluker/vscode-coverage-gutters/runs/6274012413?check_suite_focus=true https://eslint.org/docs/user-guide/command-line-interface#--ext

[timagixe]

@ryanluker thanks for running CI, I have adjusted scripts in https://github.com/ryanluker/vscode-coverage-gutters/pull/368/commits/d00386bfd9f9f187581e9e8da3e818431b518efa. I hope this time all the checks will fly 🚀