deprecate passing context and method name

[bekzod]

parsing arguments in backburner is big process, since it allows different permutations of arguments
https://github.com/BackburnerJS/backburner.js/blob/master/lib/index.ts#L31-L117 Wouldn't it be better if we reduce allowed argument combinations by removing passing context and method name, it would reduce argument parsing code hence reduce amount of work done each time we call run/debouce/throttle/....

following:

   run(this, function(){})
   run(this, 'myMethod')

could be rewritten as

   run(()=> {})
   run(()=> this.myMethod())

or

   run(function(){}.bind(this))
   run(this.myMethod.bind(this))