Merge pull request #77 from jtpio/missing-deps

Add missing dependencies to package.json

Author: wolfv

package.json

@@ -50,10 +50,12 @@
     "@jupyterlab/docregistry": "^3.0.2",
     "@jupyterlab/filebrowser": "^3.0.2",
     "@jupyterlab/launcher": "^3.0.2",
-    "@jupyterlab/mainmenu": "^3.0.2"
+    "@jupyterlab/mainmenu": "^3.0.2",
+    "@lumino/coreutils": "^1.5.3",
+    "@lumino/widgets": "^1.18.0"
   },
   "devDependencies": {
-    "@jupyterlab/builder": "^3.0.0-rc.13",
+    "@jupyterlab/builder": "^3.0.0",
     "@lumino/messaging": "^1.4.3",
     "@typescript-eslint/eslint-plugin": "^2.27.0",
     "@typescript-eslint/parser": "^2.27.0",