TSLint is deprecated

[xtqqczze]

palantir/tslint#4534

[SydneyhSmith]

Looks like this might be useful https://github.com/typescript-eslint/tslint-to-eslint-config thanks for reporting this @xtqqczze .

This is a tool that we use in our build config here: https://github.com/PowerShell/vscode-powershell/blob/master/tslint.json