JavaScript ast-grep rules to match assignment of function to pair

[jy-tan]

Previously ast-grep rules were not able to match these two cases:

module.exports.exampleFunc = function exampleFuncInner() {
  console.log("hello");
};

(exampleFuncInner would be matched, but we want exampleFunc)

module.exports.exampleFunc = () => {
  console.log("hello");
}

(wouldn't be matched)

Changes

• Modify ast-grep rules
• Add tests
• Fix PHP tests failing