CSP issue on browser webextensions

[ugiz]

Error: 'Uncaught EvalError: Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script in the following Content Security Policy directive: "script-src 'self' blob: filesystem:"'

Extensions restrictions: https://developer.chrome.com/extensions/contentSecurityPolicy#restrictions

Hi,
I would like to use the library on a browser webextension but due to CSP restrictions the following code causes the aforementioned error:
var isNode = new Function("return (typeof process !== 'undefined') && process.versions && process.versions.node");
https://github.com/rsmbl/Resemble.js/blob/master/resemble.js#L6

Would it be possible to replace the Function constructor to solve the CSP issue?
After some research I found 3 ways to accomplish the same goal:

1. Use the globalThis object to directly access the process object
2. Define a function that retrieves the global object (as defined here https://github.com/paulmillr/es6-shim/blob/master/es6-shim.js#L176 )
3. Define a polyfill function as shown here https://mathiasbynens.be/notes/globalthis#robust-polyfill

Which one do you think I could implement to solve the issue and open the PR? Any further proposal will be highly appreciated.
Thank you in advance.

[James Cryer]

globalThis seems like a sensible way forward. Worth noting that it will not work in IE11.