formattable v0.2.1

v0.2.1

Closed issues:

• Percent does not work on area() function (#75)
• Inconsistent lengths of formatted string on zero-length vectors (#115)
• Error: 'what' must be a function or character string (#116)
• Retire Travis and AppVeyor (#140)

Merged pull requests:

• Add GHA badge (#142)
• Change links to HTTPS (#141)
• Set up GitHub Pages (#137)
• Add .github to .Rbuildignore (#138)
• Install GitHub Actions workflows (#135)
• Avoid caching on AppVeyor (#134)