fix: force pod version in demo

Author: keerl

demo/app/App_Resources/iOS/Podfile

@@ -0,0 +1 @@
+pod 'Mapbox-iOS-SDK', '~> 5.1.1'

demo/app/main-page.ts

@@ -201,13 +201,13 @@ export function onMapReady(args) {
         map.removePolylines([10]);
     }, 24000);
 
-    this works just fine, but it interferes with the programmatic map so not doing this in the demo
-    setTimeout(() => {
-      map.trackUser({
-        mode: "FOLLOW_WITH_HEADING",
-        animated: true
-      });
-    }, 25000);
+    // this works just fine, but it interferes with the programmatic map so not doing this in the demo
+    // setTimeout(() => {
+    //   map.trackUser({
+    //     mode: "FOLLOW_WITH_HEADING",
+    //     animated: true
+    //   });
+    // }, 25000);
 }
 
 // END