Add support for typescript compilation on the fly for tests

[wirednkod]

Following where this appeared in #309 's comment by [@AuroraLantean[(https://github.com/AuroraLantean), we should add TS support for tests.

This could be implemented, based on extension and use tsc to build on the fly

[wirednkod]

The idea behind it (in order to be also backward compatible) comes down to:

User is able to	Program reacts with
a) Add .js extension	As it works currently (no removal of `.js`)
b) Add .ts extension	Generates .js and runs the test on the .js file - at the end it removes the .js file that was created
c) provides filename without extension	Runs (b), if not found runs (a), if non of the two found throws error

This makes it also backward compatible

cc @pepoviola

[pepoviola]

The idea behind it (in order to be also backward compatible) comes down to:

User is able to Program reacts with a) Add .js extension As it works currently (no removal of .js) b) Add .ts extension Generates .js and runs the test on the .js file - at the end it removes the .js file that was created c) provides filename without extension Runs (b), if not found runs (a), if non of the two found throws error This makes it also backward compatible

cc @pepoviola

Hi @wirednkod, yes. Make sense to me 👍 .

Thanks!