esbuild should be dev dep

Fix: #387

Author: isaacs

package-lock.json

@@ -51,6 +51,7 @@
   "devDependencies": {
     "@types/node": "^24.3.0",
     "benchmark": "^2.1.4",
+    "esbuild": "^0.25.9",
     "marked": "^4.2.12",
     "mkdirp": "^3.0.1",
     "prettier": "^3.6.2",
@@ -108,8 +109,5 @@
     }
   },
   "type": "module",
-  "module": "./dist/esm/index.js",
-  "dependencies": {
-    "esbuild": "^0.25.9"
-  }
+  "module": "./dist/esm/index.js"
 }