fix(package): update leaflet to version 1.3.2

Closes #4

Author: greenkeeper[bot]

package.json

@@ -23,7 +23,7 @@
   "license": "MIT",
   "dependencies": {
     "angular": "^1.5.5",
-    "leaflet": "^0.7.7"
+    "leaflet": "^1.3.2"
   },
   "devDependencies": {
     "angular-mocks": "^1.5.5",