feat(typescript|ci): convert js to ts

[tduyng]

Closes ~26
Closes ~27
Closes ~28

Change:

• Convert js to ts
• Refactor methods and tests
• Replace travis CI with Github actions
• Using jest for testing (instead of ava & sinon)
• Using coveralls for github actions
• Add test check for all LTS version nodejs (12.x, 14.x, 16.x)
• Change structure of project, push the code ts files in the folder src

TODO:

• Make unit test for each method (actually does not) -> to close ~25
• To fix issue of test for method pretty in /test/output_adapter.test.ts. Github actions is not working for comparing string with color
• Improve some types
• Remove lodash

[fthouraud]

Hi 👋

Thank you for your contribution. Could you consider opening a PR for each issue separately, please?

To migrate to TS, we could benefit from extended coverage (expressed in #25). That way, it would be easier to avoid errors.

[fthouraud]

By the way, I just saw you replaced AVA and Sinon with Jest. Why do you think it is an improvement?

[tduyng]

Hi Fabien, thanks for your reply.
I'll try to separate them soon. And for your question: "Why do you think it is an improvement?": It juste the problem of my vocabulary. I change the word "Improvement" to "Change". By the way, I will close this PR and try to create a PR for each issue.