chore: add repository.directory field to each package.json(#1123)

Author: visualfanatic

Diff for: packages/server-test-utils/package.json

@@ -14,7 +14,8 @@
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/vuejs/vue-test-utils.git"
+    "url": "git+https://github.com/vuejs/vue-test-utils.git",
+    "directory": "packages/server-test-utils"
   },
   "author": "vuejs",
   "license": "MIT",

Diff for: packages/test-utils/package.json

@@ -14,7 +14,8 @@
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/vuejs/vue-test-utils.git"
+    "url": "git+https://github.com/vuejs/vue-test-utils.git",
+    "directory": "packages/test-utils"
   },
   "author": "vuejs",
   "license": "MIT",