[Snyk] Security upgrade @jupyter-widgets/jupyterlab-manager from 0.28.2 to 3.0.0#9

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-5cb198333b4e281fd1eacbfbb7f4ea69

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Commits on Feb 25, 2022

fix: jslab/package.json to reduce vulnerabilities
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