leaflet bundle cannot be loaded correctly when minified

**I'm submitting a bug report**

* **Library Version:**
1.1.2

* **Operating System:**
Windows 10

* **Node Version:**
7.6.0

* **NPM Version:**
4.1.2

* **Aurelia CLI OR JSPM OR Webpack AND Version**
JSPM 0.16.53

* **Browser:**
Chrome 58 | Edge 38

* **Language:**
TypeScript 2.3.3

**Current behavior:**
I am using [leaflet.js](http://leafletjs.com/) and want to bundle my application. When I have the aurelia-bundler minify the leaflet bundle, the browsers seem to not be able to read it correctly:

`Error loading http://127.0.0.1:8080/jspm_packages/github/Leaflet/Leaflet@1.0.3/dist/leaflet-src.js as "github:Leaflet/Leaflet@1.0.3/dist/leaflet-src.js" from http://127.0.0.1:8080/jspm_packages/github/Leaflet/Leaflet@1.0.3.js`

**Expected/desired behavior:**
If I don't let the aurelia-bundler minify the bundle, everything seems to work perfectly. Here is my code: https://github.com/halllo/AureliaTutorial/blob/master/leaflet/build/bundles.js#L50

Is there anything I can do in order to correctly have the bundle minified or is this a todo on leaflet.js's part?