Temporarily revert esbuild upgrade.

Author: daveverwer

package-lock.json

@@ -15,7 +15,7 @@
         "vega": "^5.29.0"
     },
     "devDependencies": {
-        "esbuild": "^0.21.2",
+        "esbuild": "^0.20.2",
         "esbuild-sass-plugin": "^3.2.0",
         "postcss": "^8.4.38",
         "prettier": "^3.2.5",