fixed name

no - in name allowed by cordova

Author: mkobar

config.xml

@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='utf-8'?>
-<widget id="io.ionic.debt-tracker" version="0.0.2" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0">
+<widget id="io.ionic.debttracker" version="0.0.2" xmlns="http://www.w3.org/ns/widgets" xmlns:cdv="http://cordova.apache.org/ns/1.0">
     <name>DebtTracker</name>
     <description>An awesome Ionic/Cordova app.</description>
     <author email="hi@ionicframework" href="http://ionicframework.com/">Ionic Framework Team</author>
@@ -82,4 +82,5 @@
     <plugin name="cordova-plugin-ionic-webview" spec="1.1.19" />
     <plugin name="cordova-plugin-ionic-keyboard" spec="2.0.5" />
     <plugin name="cordova-plugin-camera" spec="^4.0.3" />
+    <engine name="android" spec="~7.1.1" />
 </widget>