fix: added git repo to package

Author: Ben Monro

package.json

@@ -3,6 +3,10 @@
   "version": "0.0.0-semantically-released",
   "description": "Simple and complete Svelte testing utilities that encourage good testing practices.",
   "main": "dist/index.js",
+  "repository": {
+    "type" : "git",
+    "url" : "https://github.com/testing-library/svelte-testing-library"
+  }
   "devDependencies": {
     "babel-jest": "^24.7.1",
     "deasync": "^0.1.14",