v5.1

• Xcode 10 "GM" contains one difference from the last beta: the constant MLComputeUnitsCPUAndGPU
  in the CoreML bindings.

• #222: Add a proxy for C's "FILE*" type on Python 3. This is not necessary on Python 2 because
  the default IO stack on Python 2 already uses FILE* internally.

  This proxy type is very minimal and shouldn't not be used for general I/O.

• Bindings are up-to-date w.r.t. Xcode 10.1 (beta)

• Updated the support code for framework wrappers to be able to emit deprecation warnings on
  the first import of a deprecated constants (functions and methods will only raise a deprecation
  warning when called).

  This is just an infrastructure change, the actual framework bindings do not yet contain the
  information used to emit deprecation warnings.

• Add metadata for deprecation warnings to the "Contacts" framework

• #252: Import ABCs from collections.abc instead of collections because the latter is deprecated.

• #180, #251: Instances of most builtin value types and sequences (int, float, str, unicode, tuple,
  list, set, frozenset and dict) can now be written to archives that require secureCoding.