Release 0.5.1

[gaborcsardi]

• [x] Make sure README has the correct command list.
• [x] Make sure version number is updated everywhere:
  • Cargo.toml
  • Cargo.lock (run cargo build)
  • rig.iss
  • NEWS file
  • README.Rmd
• [x] Make sure CI is OK
• [x] If needed, commit to to have a CI build with the right version number.
• [x] Build README:

  Rscript -e 'rmarkdown::render("README.Rmd")'
  

• [x] Update NEWS header to remove (not released yet)
• [x] Build signed and notarized macOS packages locally:

  export AC_PASSWORD=...
  sudo xcode-select -s /Applications/Xcode.app/Contents/Developer
  make clean
  make macos
  

• [x] Download the artifacts for the new version for Windows & Linux (x2)
• [x] Create tag for the current version, push to GH.
• [x] Create release on GH, add the installers.
• [x] Test installers.
• [x] git commit with the NEWS and README updates, update tag, push to GH, --tags as well.
• [x] Update homebrew repo.
• [ ] Update choco package.
• [ ] tweet