Disallow utils import

Author: eps1lon

packages/material-ui-icons/package.json

@@ -6,13 +6,15 @@
   "description": "Material Design icons distributed as SVG React components.",
   "exports": {
     ".": "./lib/index.js",
-    "./*": "./lib/*.js"
+    "./*": "./lib/*.js",
+    "./utils/*": null
   },
   "publishConfig": {
     "access": "public",
     "exports": {
       ".": "./index.js",
-      "./*": "./*.js"
+      "./*": "./*.js",
+      "./utils/*": null
     },
     "type": "module"
   },