Fixed ESLint rulesets to work on the most recent release
Fixed ESLint rulesets to work on the most recent release

Changed consistent-this rule to enforce 'that' instead of '_that' due to a rule conflict with no-underscore-dangle

cheapsteak/npmcharts.com,leonidas/gulp-project-template,cheapsteak/gulp-project-template,cheapsteak/gulp-project-template,cheapsteak/demo-react-transitiongroup,cheapsteak/demo-react-transitiongroup,Pinqvin/gulp-project-template,cheapsteak/npmcharts.com,leonidas/gulp-project-template,koodiklinikka/koodiklinikka.fi,koodiklinikka/koodiklinikka.fi,Pinqvin/gulp-project-template