for loop optimization: keep "this"

[kapouer]

Input code
Same example as in #686.

Config
Same config as in #686.

Output code

var _loop = function(i) {
  elem = this.elements[i];
  ../..
};
for(var i = 0; i < this.elements.length; i++)_loop(i);

Expected behavior

var _loop = function(i) {
  elem = this.elements[i];
  ../..
};
for(var i = 0; i < this.elements.length; i++)_loop.call(this, i);

Version
The version of @swc/core: 1.1.31

[swc-bot]

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