Update plugin.xml

Bump to v0.5.4

plugin.xml

@@ -3,7 +3,7 @@
 <plugin xmlns="http://www.phonegap.com/ns/plugins/1.0"
     xmlns:android="http://schemas.android.com/apk/res/android"
     id="com.transistorsoft.cordova.background-geolocation"
-    version="0.5.3">
+    version="0.5.4">
     <name>BackgroundGeolocation</name>
     <description>Sophisticated, battery-efficient background-geolocation plugin for Cordova</description>
     <license>MIT</license>