Bump 1.9.0-rc4

Signed-off-by: Joffrey F <[email protected]>

compose/__init__.py

@@ -1,4 +1,4 @@
 from __future__ import absolute_import
 from __future__ import unicode_literals
 
-__version__ = '1.9.0-rc3'
+__version__ = '1.9.0-rc4'

script/run/run.sh

@@ -15,7 +15,7 @@
 
 set -e
 
-VERSION="1.9.0-rc3"
+VERSION="1.9.0-rc4"
 IMAGE="docker/compose:$VERSION"