Add Elixir support

[jc00ke]

Associated with #10

[YasienDwieb]

@jc00ke I hope it's working fine with you, but I doubt you might be facing issues with selecting the languages after adding it

Reason is, I have went through this before also I don't see changes to src/editor/lang-heynote/parser.js in the changed files

For fixing this, you would need to run npm run build_grammar, and commit the changed src/editor/lang-heynote/parser.js file alongside your PR

[jc00ke]

For fixing this, you would need to run npm run build_grammar

That's what I was missing, thank you!

[jc00ke]

I apologize for the noiser than intended commit; my formatter did more work than we probably wanted here. I can revert the formatting if you prefer. Let me know!

[YasienDwieb]

I think that would mostly necessary so net changes are only there, also for better git changes tracking

[heyman]

Thanks for the contribution.

I apologize for the noiser than intended commit; my formatter did more work than we probably wanted here. I can revert the formatting if you prefer. Let me know!

Yes, please remove the formatting changes to keep the PR clean.

[jc00ke]

Rebased and cleaner in #288.

Thanks all for your help!