docs(readme.md): fix missing methode "example using listener"

YsnKsy · YsnKsy · commit 959503c2d44c · 2020-07-24T07:49:23.000+01:00
diff --git a/README.md b/README.md
@@ -68,6 +68,7 @@ import LocationSettingsEnabler from "react-native-location-settings-enabler"
 
 const {
   PRIORITIES: { HIGH_ACCURACY },
+  addListener,
   checkSettings,
   requestResolutionSettings
 } = LocationSettingsEnabler
