Bug: Setting ExifEntry.data doesn't set components

[jeremy-code]

Setting ExifEntry.data doesn't set its .components property. This can be done by checking the size of the format it currently has.

[jeremy-code]

Thought about fixing this but a bit uncertain since it may introduce unexpected behavior.

The easiest way to fix it would be something like:

  set data(data: Uint8Array) {
    const prevDataPtr = this.dataPtr;
    this.size = data.length;
    this.components = data.length / exifFormatGetSize(this.format);
    const dataPtr = malloc(data.byteLength);
    HEAPU8.set(data, dataPtr);
    this.dataPtr = dataPtr;

    if (prevDataPtr !== 0) {
      free(prevDataPtr);
    }
  }
``

but given that can lead to unexpected behavior if the format is not set or intentionally undefined, not sure