Updated tk-multi-launchapp to v0.13.4

Release notes: https://github.com/shotgunsoftware/tk-multi-launchapp/wiki/Release-Notes#v0134

Author: toolkitty

env/includes/common/apps.yml

@@ -47,7 +47,7 @@ common.apps.tk-multi-shotgunpanel.location:
 common.apps.tk-multi-launchapp.location:
   type: app_store
   name: tk-multi-launchapp
-  version: v0.13.3
+  version: v0.13.4
 common.apps.tk-multi-reviewsubmission.location:
   type: app_store
   name: tk-multi-reviewsubmission