Update leaflet to 1.3.0

Vendorfile

@@ -11,13 +11,13 @@ folder 'vendor/assets' do
   end
 
   folder 'leaflet' do
-    file 'leaflet.js', 'https://unpkg.com/leaflet@1.2.0/dist/leaflet-src.js'
-    file 'leaflet.css', 'https://unpkg.com/leaflet@1.2.0/dist/leaflet.css'
+    file 'leaflet.js', 'https://unpkg.com/leaflet@1.3.0/dist/leaflet-src.js'
+    file 'leaflet.css', 'https://unpkg.com/leaflet@1.3.0/dist/leaflet.css'
 
     [ 'layers.png', 'layers-2x.png',
       'marker-icon.png', 'marker-icon-2x.png',
       'marker-shadow.png' ].each do |image|
-      file "images/#{image}", "https://unpkg.com/leaflet@1.2.0/dist/images/#{image}"
+      file "images/#{image}", "https://unpkg.com/leaflet@1.3.0/dist/images/#{image}"
     end
 
     from 'git://github.com/aratcliffe/Leaflet.contextmenu.git', :tag => 'v1.2.1' do

vendor/assets/leaflet/leaflet.css

@@ -47,6 +47,7 @@
 .leaflet-container .leaflet-tile-pane img,
 .leaflet-container img.leaflet-image-layer {
 	max-width: none !important;
+	max-height: none !important;
 	}
 
 .leaflet-container.leaflet-touch-zoom {
@@ -55,7 +56,10 @@
 	}
 .leaflet-container.leaflet-touch-drag {
 	-ms-touch-action: pinch-zoom;
-	}
+	/* Fallback for FF which doesn't support pinch-zoom */
+	touch-action: none;
+	touch-action: pinch-zoom;
+}
 .leaflet-container.leaflet-touch-drag.leaflet-touch-zoom {
 	-ms-touch-action: none;
 	touch-action: none;