following libipc version

shard.yml

@@ -1,5 +1,5 @@
 name: ipcd
-version: 0.6.0 # should follow libipc and ipc.cr bindings versions.
+version: 0.7.0 # should follow libipc and ipc.cr bindings versions.
 
 authors:
     - karchnu <karchnu@karchnu.fr>
@@ -10,7 +10,7 @@ description: |
 dependencies:
     ipc:
         git: https://git.baguette.netlib.re/Baguette/ipc.cr
-        branch: poll
+        branch: master
 
 targets:
     websocketd: