avocado: Bump to release 0.18.0

Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

avocado.spec

 Summary: Avocado Test Framework
 Name: avocado
-Version: 0.17.0
+Version: 0.18.0
 Release: 1%{?dist}
 License: GPLv2
 Group: Development/Tools

avocado/version.py

@@ -18,7 +18,7 @@ __all__ = ['MAJOR', 'MINOR', 'RELEASE', 'VERSION']
 
 
 MAJOR = 0
-MINOR = 17
+MINOR = 18
 RELEASE = 0
 
 VERSION = "%s.%s.%s" % (MAJOR, MINOR, RELEASE)

setup.cfg

 [metadata]
 name = avocado
-version = 0.17.0
+version = 0.18.0
 summary = Avocado Test Framework
 description-file =
     README.rst