updated pkg requirements

package.json

@@ -1,7 +1,7 @@
 {
   "displayName": "ObjectID Rendering",
   "name": "com.unity.objectid-rendering",
-  "unity": "2019.2",
+  "unity": "2019.3",
   "version": "0.0.1-dev",
   "dependencies": {
     "com.unity.selection-groups": "0.0.4-dev"
@@ -10,6 +10,6 @@
   "author": "Simon Wittber <simonwittber@unity3d.com> (https://github.com/smnwttbr)",
   "contributors": [
     "Simon Wittber <simonwittber@unity3d.com> (https://github.com/smnwttbr)"
-  ]        
-  
+  ],
+  "type": "tool"
 }