IE11 Crashes with Firestore 7.15.5 - accessing the 'caller' property of a function or arguments object is not allowed in strict mode

[thesandlord]

[REQUIRED] Describe your environment

• Operating System version: Windows 10
• Browser version: IE 11
• Firebase SDK version: 7.15.5
• Firebase Product: Firestore

[REQUIRED] Describe the problem

The 7.15.5 SDK crashes on IE11 in strict mode with the error:

Accessing the 'caller' property of a function or arguments object is not allowed in strict mode

7.15.2 works fine, not sure what changed in between

Steps to reproduce:

Just using 7.15.5 in IE11 causes the issue, all you need to do is init the database.

Example here: https://tth9o.csb.app/

Code here: https://codesandbox.io/s/simple-firestore-javascript-example-tth9o?file=/index.html

[schmidt-sebastian]

This was fixed in #3309 and will be released this week.