Make performance configurable

[TooTallNate]

I was already including a performance property, but switching to quickjs-ng throws an error when trying to re-define that prop. Make it configurable to match browser behavior:

Object.getOwnPropertyDescriptor(globalThis, 'performance').configurable
// true

[saghul]

Is that what browsers do? I thought it would be read only since that's how it's specified: https://w3c.github.io/hr-time/#the-performance-attribute

[TooTallNate]

The script in the OP is true for at least Chrome / Firefox / Safari.

[bnoordhuis]

Read-only but [Replaceable], i.e., configurable. FWIW, it's both configurable and enumerable in node too.