BUG: v0.21.6 detects 'requires' in strings in minified files

[markwhitfeld]

Demonstration

It is not simple to provide a repro based on the Code Sandbox template provided because this issue is for SystemJS v0.21.6.
Pretty simple to explain though.
If the file being loaded is a minified file, then it detects require calls from inside strings.
For example, when loading this file: https://www.unpkg.com/@tensorflow/tfjs-backend-cpu@3.16.0/dist/tf-backend-cpu.min.js
It imports the @tensorflow/tfjs-node require, which is only found within a string in a console.log('...') call.
This is related to an issue reported here: stackblitz/core#1832

I will be submitting a PR shortly to resolve this issue. 🎉

Expected Behavior

Ignore require(...) statements in strings.

Actual Behavior

When dealing with a minified file, all require statements are parsed, no matter if they are in strings or not.

[markwhitfeld]

Submitted PR #2393 to fix this issue. 🎉