autoBind function needs a filter method

[jlyonsmith]

Thanks for creating this project. I see that there has been at least one fork that added React specific filters when choosing which methods to bind. I'd really like to make this a more general purpose mechanism. For example, if you just wanted to bind all methods that started with the word handle which is the convention that I use for event handler methods in React apps. I propose:

1. Adding an optional filter method parameter that allows custom filtering of the bind
2. Adding a predefined filter function to exclude standard React methods.

Neither of these additions would affect current users in any way. If I prepared a PR would you be interested in merging it?

[sindresorhus]

Sure, PR welcome :)

[jlyonsmith]

Sorry for the long response here. I created a PR, but I felt it was a bit too much as I basically rewrote the library in ES6 with a different test tool. So I create a new package, auto-bind2 based on your excellent work.