- update to 1.16.0:
* Note that version 1.16.0 drops support for Python 2.7 and
3.5. Python version 3.6 or later is required.
* The ``patch_function_wrapper()`` decorator now accepts an
``enabled`` argument, which can be a literal boolean value,
object that evaluates as boolean, or a callable object which
returns a boolean. In the case of a callable, determination
of whether the wrapper is invoked will be left until
the point of the call. In the other cases, the wrapper will
not be applied if the value evaluates false at the point of
applying the wrapper.
* The import hook loader and finder objects are now implemented
as transparent object proxies so they properly proxy pass
access to attributes/functions of the wrapped loader or finder.
* Code files in the implementation have been reorganized such
that the pure Python version of the ``ObjectProxy`` class
is directly available even if the C extension variant is
being used. This is to allow the pure Python variant to
be used in exceptional cases where the C extension variant is
not fully compatible with the pure Python implementation and the
behaviour of the pure Python variant is what is required.
* It was not possible to update the ``__class__`` attribute
through the transparent object proxy when relying on the C
implementation.

generating binary wheels for ``musllinux``.
* When using an adapter function to change the signature of the decorated
* Code for inspect.getargspec() when using Python 2.6 was missing