version bump

Author: PeterStaev

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nativescript-drop-down",
-  "version": "4.0.1",
+  "version": "5.0.0",
   "description": "A NativeScript DropDown widget.",
   "main": "drop-down",
   "typings": "drop-down.d.ts",
@@ -41,7 +41,7 @@
   ],
   "license": "Apache-2.0",
   "peerDependencies": {
-    "tns-core-modules": "^4"
+    "tns-core-modules": ">= 5"
   },
   "devDependencies": {
     "@angular/common": "^5.2.11",