unexpected behaviors for array index out of valid array length when set and del

[hyf0]

It's similar to vuejs/core#3816 but not exactly.

[hyf0]

set

set(ref([]).value, Math.pow(2, 32), 0) will throw error Uncaught RangeError: Invalid array length

composition-api/src/reactivity/set.ts

Lines 18 to 19 in 2c342d5

	if (isArray(target) && isValidArrayIndex(key)) {
	target.length = Math.max(target.length, key)

del

splice does not work on index out of valid array length.

composition-api/src/reactivity/del.ts

Lines 16 to 17 in 2c342d5

	if (Array.isArray(target) && isValidArrayIndex(key)) {
	target.splice(key, 1)

foo = [];
foo[Math.pow(2, 32)] = 0;
foo.splice(Math.pow(2, 32), 1);
(Math.pow(2, 32) in foo) // => true;