Describe the bug

netlify-cms is utilizing eval() in the published code. Usage of eval() is generally frowned upon. It also doesn't seem like eval() is necessary in the majority of its usages.

I noticed one usage of eval(str) which is also frowned upon. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/eval#Never_use_eval!

To Reproduce

1. Go to https://unpkg.com/netlify-cms@2.10.60/dist/netlify-cms.js
2. Search for eval(

Usages:

• const utilInspect=eval("require('util').inspect")
• eval(str)
• var crypto=eval("require('crypto')"),Buffer=eval("require('buffer').Buffer")

Expected behavior

No eval()s to exist in production code.

Applicable Versions:

• Netlify CMS version: 2.10.60
• Git provider: GitHub
• OS: MacOS X
• Browser version Chrome 85

• Node.JS version: 12.13.0