🤖 [MNT] Updating dependencies (#527)

* testutils upgrade

* broad dependency upgrades to avoid more dependabot alerts

* upgrade puppeteer

* fixed import for upstream changes

package.json

@@ -54,7 +54,7 @@
     "@jupyterlab/mathjax2": "^3.0.0",
     "@jupyterlab/outputarea": "^3.0.0",
     "@jupyterlab/services": "^6.0.0",
-    "@jupyterlab/testutils": "^3.0.11",
+    "@jupyterlab/testutils": "^3.2.4",
     "@jupyterlab/theme-light-extension": "^3.0.0",
     "babel-jest": "^26.6.1",
     "babel-loader": "^8.1.0",
@@ -69,7 +69,7 @@
     "identity-obj-proxy": "^3.0.0",
     "istanbul-instrumenter-loader": "^3.0.1",
     "jest": "^26.6.3",
-    "jest-puppeteer": "^4.4.0",
+    "jest-puppeteer": "^5.0.0",
     "jquery": "^3.5.1",
     "jquery-ui-bundle": "^1.12.1-migrate",
     "ncp": "^2.0.0",

src/thebelab.js

@@ -16,7 +16,7 @@ if (typeof window !== "undefined") {
   window.CodeMirror = CodeMirror;
 }
 
-import "@jupyterlab/theme-light-extension/style/index.css";
+import "@jupyterlab/theme-light-extension/style/theme.css";
 import "@jupyter-widgets/controls/css/widgets-base.css";
 import "@lumino/widgets/style/index.css";
 import "@jupyterlab/apputils/style/base.css";