[enh] release 0.7

CHANGELOG

 Changelog
 =========
-0.6.4 (unreleased)
-------------------
+0.7 (2018-08-21)
+----------------
 - fix to_python() when strings are indented by stripping whitespace before evaluating by duncf https://github.com/PyCQA/redbaron/pull/140

setup.py

@@ -12,7 +12,7 @@ except ImportError:
 setup(name='redbaron',
-      version='0.6.4',
+      version='0.7',
       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(),