chore: prepare next release (#549)

Preparing next release
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docs: add Mun v0.4 docs

misc: increment patch version of crates

Merge pull request #320 from baszalmstra/fix/cargo_versions

fix: cargo versions for publishing

misc(ci): build binaries for release branches

fix: convert Cargo.toml categories into slugs

fix(ci): add *.dll.lib artifact for Windows builds