fix(package): update react-native-maps to version 0.20.1

Author: greenkeeper[bot]

package.json

@@ -109,7 +109,7 @@
     "react-native-google-analytics-bridge": "5.6.0",
     "react-native-keychain": "2.0.0",
     "react-native-linear-gradient": "2.4.0",
-    "react-native-maps": "0.20.0",
+    "react-native-maps": "0.20.1",
     "react-native-network-info": "3.0.0",
     "react-native-restart": "0.0.6",
     "react-native-safari-view": "2.1.0",