[Tests] only audit prod deps

Author: ljharb

package.json

@@ -19,7 +19,7 @@
 		"pretest": "npm run lint",
 		"tests-only": "node test",
 		"test": "npm run tests-only",
-		"posttest": "npx aud",
+		"posttest": "npx aud --production",
 		"version": "auto-changelog && git add CHANGELOG.md",
 		"postversion": "auto-changelog && git add CHANGELOG.md && git commit --no-edit --amend && git tag -f \"v$(node -e \"console.log(require('./package.json').version)\")\""
 	},