Release 0.8.4

What's Changed

• Topic edit feature by @nicholasnet in #1
• Documentation update for Tansen by @nicholasnet in #2
• Added GitHub template, expanded view for messages, and switched the p… by @nicholasnet in #3
• Formatting changes and bumped up the release version. by @nicholasnet in #4
• Workflow by @ideasbucketlabs in #6

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Full change log: https://github.com/ideasbucketlabs/tansen/commits/0.8.4

Docker image https://hub.docker.com/layers/ideasbucket/tansen/0.8.4/images/sha256-b64bbb852ab61faaa9df265b387b55b2213d4bf17a59e6d4ce1f98fb245fca50?context=explore