4.2.0 is not compatible with the installed monaco-editor module

--- a/package.json
+++ b/package.json
@@ -145,7 +145,7 @@
     "micromatch": "^4.0.5",
     "minimatch": "link:/usr/share/nodejs/minimatch",
     "monaco-editor": "^0.25.2",
-    "monaco-editor-webpack-plugin": "^4.0.0",
+    "monaco-editor-webpack-plugin": "4.0.0",
     "monaco-yaml": "^2.5.1",
     "mousetrap": "1.6.5",
     "papaparse": "^5.3.1",