Merge pull request #111 from jtpio/beta-21

Update to `jupyterlite-core==0.1.0b21`

Author: jtpio

requirements.txt

@@ -1,8 +1,13 @@
 # Core modules (mandatory)
-jupyterlite-core==0.1.0b19
-jupyterlite-pyodide-kernel==0.0.5
+jupyterlite-core==0.1.0b21
 jupyterlab~=3.5.1
 
+# Python kernel (optional)
+jupyterlite-pyodide-kernel==0.0.5
+
+# JavaScript kernel (optional)
+jupyterlite-javascript-kernel==0.1.0b21
+
 # Language support (optional)
 jupyterlab-language-pack-fr-FR
 jupyterlab-language-pack-zh-CN