Closes GH-3007.

The regex to match the gdb version is not intended to be interpreted as a regular string, it is designed to be used as-is as a regex.  This lets python know that minor detail.

And make it more flexible in terms of API change.

And make it more flexible in terms of API change.

Current checks breaks when setting 0.10.0 as a Pythran version :-/

Add compatability with Bazel 0.26

Make co_argcount for positional-only arguments behave correctly, now that CPython 3.8 (beta 1) includes the pos-only count in it rather than adding it.

Avoid checking Py_TPFLAGS_HAVE_FINALIZE in Py3.8 and later since CPython now relies on the feature being there.

Fixes GH-2941.

Closes GH-2976.

When passing keyword arguments from unpacked dict literals, prevent duplicate dict keys from raising an error and instead overwrite the previous one.
Closes GH-2963.