fix(core): Restore original property descriptor on unregister

[jhnns]

Fixes a potential "Maximum callstack size exceeded" error. The current implementation doesn't cleanup the defineProperty call on the element. For every register() call, a new object descriptor is created which calls the previous one and so on. After a lot of calls of register() and unregister(), the JS engine will finally throw a callstack size error.

[jhnns]

We stumbled upon this issue because we use a callback ref to set the ref.current value:

  // Simplified example

  const inputRef = useMask({ /* ... */ });

  return (
    <input
      ref={(element) => {
          inputRef.current = element
      }} 
    />
  );

Since this passes a new function reference for every render, React calls the previous function with null. This causes unregister() and register() to be called via react-input's proxy for every rerender.