Use repository.directory field in package.json files (#11625)

Co-authored-by: Nicolas Stepien <567105+nstepien@users.noreply.github.com>
Co-authored-by: Nicolò Ribaudo <nicolo.ribaudo@gmail.com>

packages/babel-plugin-transform-spread/package.json

@@ -2,7 +2,11 @@
   "name": "@babel/plugin-transform-spread",
   "version": "7.10.0",
   "description": "Compile ES2015 spread to ES5",
-  "repository": "https://github.com/babel/babel/tree/master/packages/babel-plugin-transform-spread",
+  "repository": {
+    "type" : "git",
+    "url" : "https://github.com/babel/babel.git",
+    "directory": "packages/babel-plugin-transform-spread"
+  },
   "license": "MIT",
   "publishConfig": {
     "access": "public"