Nullish coalescing support

[sanex3339]

I have no idea what I'm doing but it works. Probably it can be done in a more simple way.

[sanex3339]

@bakkot, @michaelficarra Now let's do this!

[sanex3339]

Looks like this one will take a bunch of the time too =(

[sanex3339]

@bakkot may you review this please? It would be nice to get this in good form before @michaelficarra see this.

[sanex3339]

@michaelficarra any news?

[sanex3339]

And again two months have passed since the PR was created and still no response =(

[sanex3339]

@bakkot thank you, i updated the PR: https://github.com/estools/escodegen/pull/417/commits/5646f113ae78eca9046da1b8e4ea20d4baec87ad

[sanex3339]

@michaelficarra may you check it now?

[sanex3339]

@michaelficarra ping. Please check this.

[sanex3339]

@michaelficarra ping

[sanex3339]

@michaelficarra this PR is still here. 3 months have left since it was created.

[sanex3339]

@michaelficarra @Constellation ping Let's celebrate the 3rd month that is passed without any attention to this PR.

[sanex3339]

@michaelficarra ping

[sanex3339]

@michaelficarra please check this

[sanex3339]

@michaelficarra ping

[sanex3339]

@michaelficarra ping

[sanex3339]

Seems it's definitely the time to create a fork.

[sanex3339]

@michaelficarra Ping

[sanex3339]

@michaelficarra last ping in hope that it will be merged and I wont create a fork with all my PRs

[sanex3339]

I created the fork with this feature: https://www.npmjs.com/package/@javascript-obfuscator/escodegen