2.0.0: Optional catch binding support, removed CLI scripts

[sanex3339]

2.0.0:

• Optional catch binding support
• Removed CLI scripts
• Increased minimal required node.js version to 8+
• updated gulp to 4+ version to support development on node.js 12+
• updated gulpfile.js

This is breaking PR, so, updated version to 2.0.0

[sanex3339]

@michaelficarra need your review

[sanex3339]

Ping

[sanex3339]

@michaelficarra ping

[sanex3339]

@michaelficarra ping

[michaelficarra]

@sanex3339 I don't like that this PR includes so many unrelated changes. I would accept a PR that just adds the optional catch binding support. The remaining changes don't seem worth it to me, but we can have conversation about that in separate PRs. Closing this, but feel free to open separate PRs for these separate features.

[sanex3339]

Optional catch binding is not supported by esprima right now, so, i will added espree that support it.
But espree does not support node@4.
So i updated to node@8 and fixed compilation on current LTS node 12+ by updating gulp to gulp@4.

You should understand that this project used by a thousand other projects, but it very old and step-by-step it should become more modern. At least, people who can support it should do it without problems.

Anyway, I agree with you.

[sanex3339]

Will recreate this PR using acorn

[sanex3339]

#405