fix(deps): update dependency react-native to v0.56.0 (#134)

Author: renovate[bot]

src/templates/React InstantSearch Native/package.json

@@ -16,7 +16,7 @@
     "prop-types": "15.6.2",
     "react": "16.4.1",
     "react-instantsearch-native": "{{libraryVersion}}",
-    "react-native": "0.55.4"
+    "react-native": "0.56.0"
   },
   "devDependencies": {
     "eslint": "5.1.0",