Tenth CRAN Release

This update adds the following features:

• Initial versions of pivot_longer() and pivot_wider() have been added (#101, @etiennebacher).
• The .names argument in across() now accepts {.col} and {.fn} to automatically name new columns (#100, @etiennebacher).
• New function lst() to reproduce the outputs of tibble::lst(). It enables the creation of lists where elements are built sequentially (i.e depend on the previous ones) and are self-named (i.e the expression is used if no name is given) (#108).

The following fixes were also implemented:

• arrange() now works for descending character vectors (#99, @etiennebacher).
• arrange() now resets row names when they are numeric (#102, @etiennebacher).
• distinct() now resets row names when they are numeric (#106, @etiennebacher).

The CICD pipeline was also fixed such that users can now tests pull requests. The documentation is now built using HTML5.