updated dependencies & lock file

package.json

@@ -10,11 +10,10 @@
   "author": "Marc Mautz <m.mautz@herzogkommunikation.de>",
   "license": "MIT",
   "dependencies": {
-    "bootstrap": "3.3.7",
     "imagesloaded": "^4.1.4",
     "shufflejs": "^5.0.3",
     "vue-i18n": "^7.4.2",
-    "vue-multiselect": "2.0.8"
+    "vue-multiselect": "^2.0.8"
   },
   "devDependencies": {
     "babel-core": "^6.26.0",
@@ -41,5 +40,8 @@
     "vue-template-compiler": "^2.5.13",
     "webpack": "^3.10.0",
     "webpack-merge": "^4.1.1"
+  },
+  "peerDependencies": {
+    "bootstrap": "^3.3.7"
   }
 }