Release 1.9.0
New in release 1.9.0:
The addition, subtraction, multiplication and shift operations have been modified
to use the 'withUnsafeMutableBufferPointer' function in order to avoid
that the compiler generates - in this case unneccesary - array index bound checks.
This speeds up the execution. For example, the BigInt testsuite runs about 8 - 10% faster than it did before.
Thanks to Jack Leow for suggesting the use of 'withUnsafeMutableBufferPointer'.