As previously, remove hammerjs dependency

Author: peterpeterparker

README.md

@@ -35,6 +35,18 @@ To implement a card stack, follow the example provided by angular2-swing
 
 See https://github.com/ksachdeva/angular2-swing
 
+## Notes regarding hammerjs
+
+This library need `hammerjs` but isn't shipped with it because some framework, like `Ionic v3`, already include it in their own resources. If it isn't your case, you would need to install `hammerjs` in your project 
+
+```bash
+$ npm install hammerjs --save
+```
+
+and add the following line to your `app.component.ts`
+
+    import 'hammerjs';
+
 ## Development
 
 To generate the library using ng-packagr (https://github.com/dherges/ng-packagr)

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "ionic-swing",
-  "version": "2.0.1",
+  "version": "2.1.0",
   "license": "MIT",
   "scripts": {
     "ng": "ng",
@@ -23,7 +23,6 @@
     "@angular/platform-browser-dynamic": "^6.0.9",
     "@angular/router": "^6.0.9",
     "core-js": "^2.5.7",
-    "hammerjs": "^2.0.8",
     "raf": "^3.1.0",
     "rebound": "0.0.13",
     "sister": "^3.0.1",