Fix package.json

package.json

@@ -103,6 +103,7 @@
         "webpack": "^4.25.1",
         "webpack-cli": "^3.1.2",
         "webpack-dev-server": "^3.1.14",
-        "webpack-stream": "5.0.0"
+        "webpack-stream": "5.0.0",
+        "react-contextmenu": "~2.10.0"
     }
-}
+}