v0.7.3 (#415)

* chore: update heading format of news

* Increment version number to 0.7.3

* chore: use_tidy_description()

* chore: use_tidy_coc()

* chore: use_github_links()

* chore: use_roxygen_md(); roxygen2md::roxygen2md()

* chore: air format .

* chore: use_cran_comments()

* chore: revdepcheck::cloud_check()

* chore: update CRAN comments

shinydashboard 0.7.2 on CRAN

shinydashboard 0.7.1 on CRAN

shinydashboard 0.7.0 on CRAN

shinydashboard 0.6.1 on CRAN

shinydashboard 0.6.0 on CRAN

shinydashboard 0.5.3 on CRAN

shinydashboard 0.5.2 on CRAN

shinydashboard v0.5.1

shinydashboard 0.5.0