Fix: bower dependency on angular

Author: roger2hk

bower.json

@@ -9,7 +9,7 @@
     "url": "https://github.com/a8m/angular-filter.git"
   },
   "dependencies": {
-    "angular": "1.4.3"
+    "angular": ">=1.4.3"
   },
   "devDependencies": {
     "angular-mocks": "1.4.3"
@@ -27,4 +27,4 @@
     "travis.yml",
     ".bowercc"
   ]
-}
+}