feat(checkbox): checkbox-square/platform updates

js/angular/service/ionicConfig.js

@@ -220,6 +220,9 @@ IonicModule
       text: PLATFORM,
       previousTitleText: PLATFORM
     },
+    form: {
+      checkbox: PLATFORM
+    },
     tabs: {
       style: PLATFORM,
       position: PLATFORM
@@ -255,6 +258,10 @@ IonicModule
       previousTitleText: true
     },
 
+    form: {
+      checkbox: 'circle'
+    },
+
     tabs: {
       style: 'standard',
       position: 'bottom'
@@ -294,6 +301,10 @@ IonicModule
       previousTitleText: false
     },
 
+    form: {
+      checkbox: 'square'
+    },
+
     tabs: {
       style: 'striped',
       position: 'top'