Add paramArray support to Javascript Binding

[ChrisBardsley]

This fix allow you to use a params array for a parameter in your C# object that is bound to your javascript functions.

[amaitland]

This should be in BindingTest.html. Also having A fix to allow params to be used by the .NET methods called by the javascript is not really relevant to someone using CefSharp. Simple description of what your demoing would be better 👍

[amaitland]

@ChrisBardsley Welcome, and thanks for the contribution 😄 Comments inline, by all means ask any questions for clarification.

I'd also like to rename this to something simple like Add paramArray support to Javascript binding, for a few reasons

• Fix implies it was supported and didn't work, it just plain wasn't supported
• I believe at least VB.Net has support for params, so C# is a little too specific here.

[amaitland]

@ChrisBardsley Any further comment on this? Initially I was planning on this being in the 49.0.0 release, as it stands it'll be bumped to 51

[amaitland]

@ChrisBardsley Merged with changes, see 669404f (comments welcome)

I'll review one more time in the next few days before merging into the cefsharp/49 branch.

Thanks for the contribution 👍

[ray007]

There seems to be a problem with managing missing/optional parameters.
in JavascriptObjectRepository.cs line 123 my null-Parameter from javascript gets matched in replaced by a MissingParameter.

[amaitland]

@ray007 Please open a new issue. Ideally submitting a PR with a proposed solution.