Update ipywidgets in jupyterlite to 7.7.0

Author: jasongrout

docs/source/jupyterlite_config.json

@@ -26,7 +26,7 @@
         "https://files.pythonhosted.org/packages/py2.py3/i/ipython-genutils/ipython_genutils-0.2.0-py2.py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py2.py3/i/ipyvue/ipyvue-1.7.0-py2.py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py2.py3/i/ipyvuetify/ipyvuetify-1.8.2-1-py2.py3-none-any.whl",
-        "https://files.pythonhosted.org/packages/py2.py3/i/ipywidgets/ipywidgets-7.6.5-py2.py3-none-any.whl",
+        "https://files.pythonhosted.org/packages/py2.py3/i/ipywidgets/ipywidgets-7.7.0-py2.py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py2.py3/m/mistune/mistune-0.8.4-py2.py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py2.py3/m/mypy-extensions/mypy_extensions-0.4.3-py2.py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py2.py3/p/pandocfilters/pandocfilters-1.5.0-py2.py3-none-any.whl",
@@ -54,7 +54,7 @@
         "https://files.pythonhosted.org/packages/py3/j/jsonschema/jsonschema-4.4.0-py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py3/j/jupyter-client/jupyter_client-7.1.2-py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py3/j/jupyter-core/jupyter_core-4.9.2-py3-none-any.whl",
-        "https://files.pythonhosted.org/packages/py3/j/jupyterlab-widgets/jupyterlab_widgets-1.0.2-py3-none-any.whl",
+        "https://files.pythonhosted.org/packages/py3/j/jupyterlab-widgets/jupyterlab_widgets-1.1.0-py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py3/m/matplotlib-inline/matplotlib_inline-0.1.3-py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py3/n/nbclient/nbclient-0.5.11-py3-none-any.whl",
         "https://files.pythonhosted.org/packages/py3/n/nbconvert/nbconvert-6.4.2-py3-none-any.whl",