Feature: allow for attributeFilter customisation

[ronimizy]

hi, found your package very useful, but 'class' filter in MutationObserver is quite limiting. having a scenario when grid is formed dynamically with positioning via style attributes, so I am forced to hack my way around with "version" class that increments every position change :)

animate-css-grid/src/index.ts

Lines 332 to 337 in 599ee43

	observer.observe(container, {
	childList: true,
	attributes: true,
	subtree: true,
	attributeFilter: ['class'],
	});

attributeFilter customisation should be a simple addition of attributeFilter property to WrapGridArguments with default value of ['class'].

animate-css-grid/src/index.ts

Lines 100 to 106 in 599ee43

	{
	duration = 250,
	stagger = 0,
	easing = 'easeInOut',
	onStart = () => { },
	onEnd = () => { },
	}: WrapGridArguments = {}

I would gladly contribute to implement this feature, if @aholachek OK this change