v0.20.4 the "Iff, no really only if" release

This release adds the Iff function, which takes a callback function instead of the Node that regular If does, for those cases where you need to conditionally add components but they can fail for some reason (but usually nil pointer panics). Thanks, @JulienTant!

What's Changed

• Add dir by @amrojjeh in #176
• Add a Iff helper by @JulienTant in #172
• Add datetime attribute by @JulienTant in #177
• Adjust documentation on Iff by @markuswustenberg in #179
• Add LabelEl by @markuswustenberg in #180
• Add links to godoc by @markuswustenberg in #183

New Contributors

• @amrojjeh made their first contribution in #176

Full Changelog: v0.20.3...v0.20.4