Enable redux-sac 0.7.x.

package.json

@@ -22,6 +22,6 @@
   "dependencies": {
     "redux": "^3.7.2",
     "redux-effex": "^1.1.2",
-    "redux-sac": "^0.6.0"
+    "redux-sac": ">=0.6.0 <0.8.0"
   }
 }