- Support for array-like indexing on strings (closes: https://github.com/trizen/sidef/issues/36) (thanks to @catb0t for reporting).
- Support for array-like indexing on strings (closes: https://github.com/trizen/sidef/issues/36) (thanks to @catb0t for reporting).

Example:

	say "foo"[0]		#=> f
	say "bar"[-1]		#=> r
	say ["foobar"[0..2]]	#=> ["f","o","o"]
	say ["foobar"[3..5]]	#=> ["b","a","r"]

Although, it's not very efficient, because it has to convert the string into an array for every indexing, which is not efficient on large strings.

It's more efficient to use the `.char(n)` method instead. This feature was added only for convenience.

trizen/sidef,trizen/sidef,trizen/sidef,trizen/sidef