chore: add preview image and update package.json

Author: keerl

images/preview.png

@@ -1,32 +1,25 @@
 {
   "name": "@nativescript-community/ui-mapbox",
   "version": "6.0.4",
-  "description": "A Nativescript plugin for Mapbox Native Maps.",
+  "description": "Interactive, thoroughly customizable maps powered by vector tiles and OpenGL",
   "main": "mapbox",
   "typings": "index.d.ts",
   "nativescript": {
     "platforms": {
       "android": "3.0.0",
       "ios": "3.0.0"
-    },
-    "plugin": {
-      "nan": true,
-      "pan": true,
-      "core3": "true",
-      "category": "Interface"
     }
   },
-  "repository": {
-    "type": "git",
-    "url": "https://github.com/nativescript-community/ui-mapbox.git"
-  },
   "keywords": [
-    "ecosystem:nativescript",
     "NativeScript",
     "Map",
     "Maps",
     "Native Maps",
-    "Mapbox"
+    "Mapbox",
+    "iOS",
+    "Android",
+    "Angular",
+    "preview|https://raw.githubusercontent.com/nativescript-community/ui-mapbox/master/images/preview.png"
   ],
   "author": {
     "name": "Yermo Lamers",
@@ -47,7 +40,10 @@
   "bugs": {
     "url": "https://github.com/nativescript-community/ui-mapbox/issues"
   },
-  "homepage": "https://github.com/nativescript-community/ui-mapbox",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/nativescript-community/ui-mapbox"
+  },
   "readmeFilename": "README.md",
   "dependencies": {
     "@nativescript-community/perms": "^2.1.1"