Update: add fixer for wrap-iife

[not-an-aardvark]

What is the purpose of this pull request? (put an "X" next to item)

[ ] Documentation update
[ ] Bug fix (template)
[ ] New rule (template)
[ ] Changes an existing rule (template)
[x] Add autofixing to a rule
[ ] Add a CLI option
[ ] Add something to the core
[ ] Other, please explain:

Please check each item to ensure your pull request is ready:

• I've read the pull request guide
• I've included tests for my change
• I've updated documentation for my change (if appropriate)

What changes did you make? (Give an overview)

This adds a fixer for wrap-iife.

If the IIFE has no surrounding parentheses, the fixer surrounds it with parentheses. The fixer also removes parentheses that are in the wrong place according to the rule option:

/* eslint wrap-iife: [2, "outside"] */

var foo = function() {}();
(function() {})();

// gets fixed to:

var foo = (function() {}());
(function() {}());

/* eslint wrap-iife: [2, "inside"] */

var foo = function() {}();
(function() {}());

// gets fixed to:

var foo = (function() {})();
(function() {})();

Is there anything you'd like reviewers to focus on?

Nothing in particular.

[mention-bot]

@not-an-aardvark, thanks for your PR! By analyzing the annotation information on this pull request, we identified @vitorbal, @lo1tuma and @ilyavolodin to be potential reviewers

[eslintbot]

LGTM

[mysticatea]

LGTM, thank you!

[platinumazure]

Minor tweak about multiline comments, otherwise looks good.

[platinumazure]

In our coding conventions, we prefer multi-line comments to be formatted like this:

/*
 * First line of comment here.
 * Second line. Note that each line starts with asterisk aligned with the open-comment asterisk character.
 * Both comment start and end should be on their own line.
 * Comment ends with asterisk of close-comment token aligned with other asterisks.
 */

[platinumazure]

Same as above re: multiline comment.

[eslintbot]

LGTM

[not-an-aardvark]

Added a commit to fix multiline comment style.

[platinumazure]

Thanks @not-an-aardvark, changes LGTM.

[kaicataldo]

I'll champion this.

[kaicataldo]

LGTM. Thanks for contributing to ESLint!