Add repository field

PR-URL: #7
Credit: @piotr-cz
Close: #7
Reviewed-by: @isaacs

Author: piotr-cz

package.json

@@ -2,6 +2,7 @@
   "name": "tsimp",
   "version": "2.0.11",
   "license": "BlueOak-1.0.0",
+  "repository": "https://github.com/tapjs/tsimp",
   "files": [
     "dist"
   ],