Fix: wrap-iife autofix removes mandatory parentheses

[mdjermanovic]

Prerequisites checklist

• I have read the contributing guidelines.
• The team has reached consensus on the changes proposed in this pull request. If not, I understand that the evaluation process will begin with this pull request and won't be merged until the team has reached consensus.

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

[X] Bug fix

Tell us about your environment

• ESLint Version: 7.0.0-alpha.0
• Node Version: v12.14.0
• npm Version: v6.13.4

What parser (default, Babel-ESLint, etc.) are you using?

default

Please show your full configuration:

Configuration

module.exports = {
    parserOptions: {
        ecmaVersion: 2020
    },
};

What did you do? Please include the actual source code causing the issue.

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

if (function (){}()) {}

while (function (){}()) {}

do {} while (function (){}())

switch (function (){}()) {}

with (function (){}()) {}

foo(function (){}());

new foo(function (){}());

import(function (){}());

new (function (){}())();

Online Demo Link (v6.8.0 actual)

What did you expect to happen?

Autofix to just parenthesize function expressions, without removing mandatory parentheses in constructs and necessary grouping parentheses after new.

What actually happened? Please include the actual, raw output from ESLint.

Autofix:

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

if (function (){})() {} // syntax error

while (function (){})() {} // syntax error

do {} while (function (){})() // syntax error

switch (function (){})() {} // syntax error

with (function (){})() {} // syntax error

foo(function (){})(); // changed behavior

new foo(function (){})(); // changed behavior

import(function (){})(); // changed behavior

new (function (){})()(); // changed behavior

What changes did you make? (Give an overview)

Fixed the auto-fix to just add new parens around FunctionExpression when the existing parens around CallExpression cannot be removed.

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

[kaicataldo]

This LGTM! The comments are all very helpful and make the tests easy to understand 👍