* Increment version number to 0.4.3

* chore: add cran comments

* Fix indents and invisible characters (GitHub Actions)

* Re-build README.Rmd (GitHub Actions)

* Re-build index.Rmd (GitHub Actions)

* chore: urlchecker::url_update()

* chore: align and register s3 print methods

* tests: Update and fix tests

* docs: update link in thanks

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Co-authored-by: gadenbuie <gadenbuie@users.noreply.github.com>

Closes #67
Thanks @andrewpbray

This way, warning show up in the console when rendering

- Move long intro to pkgdown
- README is now much shorter
- Rename pkgdown "Get Started" to "Features"
- Add ggplot theme to quick intro
- Add pkgdown docs link to description

- Moved images to assets branch
- Moved rmd fragments to man/fragments