Move to @codemirror/buildhelper 1.0.0

Author: marijnh

package.json

@@ -30,7 +30,7 @@
     "@lezer/rust": "^1.0.0"
   },
   "devDependencies": {
-    "@codemirror/buildhelper": "^0.1.0"
+    "@codemirror/buildhelper": "^1.0.0"
   },
   "repository": {
     "type": "git",