Upgrade notes for Shiny 1.0.3

This is a hotfix release of Shiny. With previous versions of Shiny, when running an application on the newly-released version of R, 3.4.0, it would print a message: Warning in body(fun) : argument is not a function. This has no effect on the application, but because the message could be alarming to users, we are releasing a new version of Shiny that fixes this issue.

Full changelog

Bug fixes

  • Fixed #1672: When an error occurred while uploading a file, the progress bar did not change colors. (#1673)