chore: update repository to point to correct github repository

Author: danielpza

package.json

@@ -7,7 +7,7 @@
     "migrations"
   ],
   "author": "TJ Holowaychuk <[email protected]>",
-  "repository": "git://github.com/visionmedia/node-migrate",
+  "repository": "git://github.com/tj/node-migrate",
   "bin": {
     "migrate": "./bin/migrate",
     "migrate-init": "./bin/migrate-init",