chore: use package-preview

Author: zkochan

package.json

@@ -10,7 +10,7 @@
     "node": ">=4"
   },
   "scripts": {
-    "test": "node test && standard"
+    "test": "preview && node test && standard"
   },
   "repository": {
     "type": "git",
@@ -31,6 +31,7 @@
   },
   "homepage": "https://github.com/pnpm/encode-registry#readme",
   "devDependencies": {
+    "package-preview": "^1.0.0",
     "standard": "^10.0.2",
     "tape": "^4.7.0"
   },