[enh] release 0.8

CHANGELOG

 Changelog
 =========
-0.8 (unreleased)
+0.8 (2018-10-29)
 ----------------
 - add support to typed function arguments https://github.com/PyCQA/redbaron/pull/168 Scott Belden and additional work by bram

setup.py

@@ -12,7 +12,7 @@ except ImportError:
 setup(name='redbaron',
-      version='0.7.1',
+      version='0.8',
       description='Abstraction on top of baron, a FST for python to make writing refactoring code a realistic task',
       author='Laurent Peuch',
       long_description=read_md("README.md") + "\n\n" + open("CHANGELOG", "r").read(),