chore(package): update prettier to version 1.7.3

Author: greenkeeper[bot]

package.json

@@ -117,7 +117,7 @@
     "marked": "0.3.6",
     "minimist": "1.2.0",
     "pify": "3.0.0",
-    "prettier": "1.7.2",
+    "prettier": "1.7.3",
     "react-native-view-shot": "1.12.0",
     "react-test-renderer": "16.0.0-alpha.12",
     "string-natural-compare": "2.0.2"