Accept browser-sync config as a JS file to allow use of regexp and functions

[stu177]

For example with rewriteRules using regexp in the match:

rewriteRules = [
  {
    match: /mysite\.localtest\.me/g,
    replace: 'localhost:3000'
  },
]

[tommypyatt]

Hi @Igloczek. I assume you would want this to accept a JS file but still work if a JSON file is provided, rather than just enforcing JS instead of JSON, so as not to break backwards compatibility. Is this correct?

[Igloczek]

Actually, I've added a .js config files support with the 1.11.0 version, so you may want to try if it works okay with BS now. It does not work with BS, yet.

@tommypyatt absolutely