chore: Migrate from TSLint to ESLint

[F3n67u]

No description provided.

[jonaskello]

@F3n67u Thank you for starting this, I have been thinking to get around to it :-)

I changed the package.json script to run eslint instead of tslint. You can try it with yarn lint. It gives some additional warnings, I think it is because the tests were not included. Would you mind fixing those too?

[F3n67u]

@F3n67u Thank you for starting this, I have been thinking to get around to it :-)

I changed the package.json script to run eslint instead of tslint. You can try it with yarn lint. It gives some additional warnings, I think it is because the tests were not included. Would you mind fixing those too?

thanks for review. all warning is cleared.

[F3n67u]

@jonaskello could you help review other pr I filed?