chore: update to JupyterLab 2.0

Author: mariobuikhuizen

package.json

@@ -37,12 +37,12 @@
     "watch": "tsc -w"
   },
   "dependencies": {
-    "@jupyterlab/application": "^2.0.0-rc.0",
-    "@jupyterlab/apputils": "^2.0.0-rc.0",
-    "@jupyterlab/coreutils": "^4.0.0-rc.0",
-    "@jupyterlab/mainmenu": "^2.0.0-rc.0",
-    "@jupyterlab/notebook": "^2.0.0-rc.0",
-    "@jupyterlab/services": "^5.0.0-rc.0",
+    "@jupyterlab/application": "^2.0.2",
+    "@jupyterlab/apputils": "^2.0.2",
+    "@jupyterlab/coreutils": "^4.0.2",
+    "@jupyterlab/mainmenu": "^2.0.2",
+    "@jupyterlab/notebook": "^2.0.2",
+    "@jupyterlab/services": "^5.0.2",
     "@lumino/commands": "^1.9.2",
     "@lumino/widgets": "^1.10.0"
   },