Github action conversion

[aylapear]

The Bug

While installing the infrastructure for the GitHub actions it caused the logo in the README to not stop displaying properly due to a broken link.

[aylapear]

Running use_pkgdown_travis() generated this error

"-- Building favicons -----------------------------------------------------------
Building favicons with realfavicongenerator.net...
* Set up deploy keys by running `travis::use_travis_deploy()`
* Insert the following code in '.travis.yml'
  before_cache: Rscript -e 'remotes::install_cran("pkgdown")'
  deploy:
    provider: script
    script: Rscript -e 'pkgdown::deploy_site_github()'
    skip_cleanup: true
  [Copied to clipboard]
√ Initializing empty gh-pages branch
Error in gh_process_response(raw) : 
GitHub API error (404): 404 Not Found
Message: Not Found
Read more at https://developer.github.com/v3/git/commits/#create-a-commit

URL not found: https://api.github.com/repos/poissonconsulting/tinter/git/commits

But it appears to have created the gh-pages branch and website is updating with the new changes