Fails to convert a test that contains an inner arrow function and incorrectly converts a test that has an inner function

[kayleewright-bluescape]

(Note the examples below are not my actual tests but the simplest form in which I could repo the issue.)

Problem:

1. If my test contains an inner arrow function like () => {} or () => returnValue then the converter does not identify the test as one needing updates.
2. If my test contains an inner function like function(arg1) {return returnValue} then the converter converts the args of the inner function too! (which isn't correct)

Arrow function example:

Scenario('myTest', async function (I) {
  const myList = ['#1', '#2', '#3'];
  myList.forEach((x) => '1');
})

Output:
1 unmodified
(no change to test)

function example:

Scenario('myTest', async function (I) {
  const myList = ['#1', '#2', '#3'];
  myList.forEach(function (x) {return '1'});
})

Output:
1 ok

Scenario('myTest', async function ({ I }) {
  const myList = ['#1', '#2', '#3'];
  myList.forEach(function ({ x }) {return '1'});
})