Prepare release 5.8.0 [skip ci]

CHANGELOG

@@ -1,3 +1,5 @@
+Version 5.8.0 - 2020-11-02
+* Bug fixes (see mercurial logs for details)
 * Remove support for Python 3.5
 * Support PYSON comparison of date and datetime
 

proteus/__init__.py

@@ -10,7 +10,7 @@ from decimal import Decimal
 
 import proteus.config
 
-__version__ = "5.7.0"
+__version__ = "5.8.0"
 __all__ = ['Model', 'Wizard', 'Report']
 
 _MODELS = threading.local()