feat: replace JSON.parse with typescript builtin config parser

[vivedo]

As mentioned in issue #42, borp currently encounters errors when parsing tsconfig.json with comments (and more non standard JSON syntax) because it uses JSON.parse and does not support features available in tsc, such as the ability to extend other configuration files.

typescript provides a few functions to access its internal configuration parser, which can handle all of these cases and provide borp with the exact same configuration as tsc will have

[mcollina]

This is great, but borp doesn't depend on typescript directly. You should load that dynamically.

[vivedo]

Absolutely, should be good to go now!

[mcollina]

lgtm