fix (collections/includesValue): prevent enumerable prototype check

[ayame113]

Add an Object.hasOwn() check to the for...in loop to prevent enumeration of keys that exist in prototype.

before:

Object.prototype.a = "hello";
includesValue({}, "hello"); // => true

after fix:

Object.prototype.a = "hello";
includesValue({}, "hello"); // => false

[LionC]

LGTM - and good timing, as this is not breaking now (function has not been released yet)

Pinging @kt3k

[kt3k]

@ayame113 LGTM. Nice!