Deprecated prepush checks

Hi!

Each time I push my code to my git repo, I get the following output:
```
no-use-before-declare is deprecated. Since TypeScript 2.9. Please use the built-in compiler checks instead.
typeof-compare is deprecated. Starting from TypeScript 2.2 the compiler includes this check which makes this rule redundant.
no-unused-variable is deprecated. Since TypeScript 2.9. Please use the built-in compiler checks instead.
```
Can something be done to eliminate these warnings? They make it harder to see if anything went wrong in the prepush check (and frankly, deprecated code should usually be avoided/upgraded for good reasons..)

Thanks!