Update Node dependencies (#18)

This PR updates all dependencies.

Author: mpdude

README.md

@@ -194,4 +194,4 @@ If you're a developer looking for new challenges, we'd like to hear from you! Ot
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-Copyright 2020 webfactory GmbH, Bonn. Code released under [the MIT license](LICENSE).
+Copyright 2020 - 2022 webfactory GmbH, Bonn. Code released under [the MIT license](LICENSE).