doc: add support info (#843)

* doc: add support info

PR-URL: nodejs/node-addon-api#843
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: NickNaso <nicoladelgobbo@gmail.com>

package-support.json

@@ -0,0 +1,21 @@
+{
+  "versions": [
+    {
+      "version": "*",
+      "target": {
+        "node": "active"
+      },
+      "response": {
+        "type": "time-permitting",
+        "paid": false,
+        "contact": {
+          "name": "node-addon-api team",
+          "url": "https://github.com/nodejs/node-addon-api/issues"
+        }
+      },
+      "backing": [ { "project": "https://github.com/nodejs" },
+                   { "foundation": "https://openjsf.org/" }
+      ]
+    }
+  ]
+}

package.json

@@ -307,5 +307,6 @@
     "lint:fix": "git-clang-format"
   },
   "pre-commit": "lint",
-  "version": "3.0.2"
+  "version": "3.0.2",
+  "support": true
 }