Update nbxmpp dependency to 0.6.0

gajim/gajim.py

@@ -53,7 +53,7 @@ from gajim.common import i18n
 from gajim.common import logging_helpers
 from gajim.common import crypto
 
-MIN_NBXMPP_VER = "0.5.6"
+MIN_NBXMPP_VER = "0.6.0"
 
 
 class GajimApplication(Gtk.Application):

setup.py

@@ -269,7 +269,7 @@ setup(
     data_files=data_files,
     install_requires=[
         'dbus-python;sys_platform=="linux"',
-        'nbxmpp',
+        'nbxmpp>=0.6.0',
         'pyOpenSSL>=0.12',
         'pyasn1',
     ],