Array square

Requirements

• Define Array.prototype.square using a regular function so this refers to the calling array.
• Return a new array where every numeric value is multiplied by itself. Support negative numbers, zero, and fractions.
• Do not mutate the original array. Empty arrays return an empty array; sparse slots remain sparse.
• Install the method as a non-enumerable, writable, and configurable property. You may use Array.prototype.map.
• Inputs contain numbers only. This is a sandbox exercise; changing built-in prototypes in application code is not required.

Examples

Input: [1, -2, 3].square()
Output: [1, 4, 9]