title: Dart/Flutter packages conflict
body: <p>I try to implement this map in my flutter application:
  <a href="https://github.com/apptreesoftware/flutter_map" rel="nofollow noreferrer">https://github.com/apptreesoftware/flutter_map</a></p>
  
  <p>If I run example code from github above, it throws such an error: </p>
  
  <pre><code>type 'Bounds&lt;num&gt;' is not a subtype of type 'Bounds&lt;double&gt;' where
  Bounds is from package:flutter_map/src/core/bounds.dart
  num is from dart:core
  Bounds is from package:flutter_map/src/core/bounds.dart
  double is from dart:core
  </code></pre>
  
  <p>My imports: </p>
  
  <pre><code>import 'package:flutter/material.dart';
  import 'package:latlong/latlong.dart';
  import 'package:flutter_map/flutter_map.dart';
  </code></pre>