function readPlainInt96(reader, count) {
  const values = new Array(count)
  for (let i = 0; i < count; i++) {
    const low = reader.view.getBigInt64(reader.offset + i * 12, true)
    const high = reader.view.getInt32(reader.offset + i * 12 + 8, true)
    values[i] = BigInt(high) << 64n | low
  }
  reader.offset += count * 12
  return values
}
Read `count` int96 values.

@param {DataReader} reader
@param {number} count
@returns {bigint[]}