cli 3.5.0

• New keypress() function to read a single key press from a terminal.

• New function pretty_print_code() to print function objects with syntax
  highlighting at the R console.

• col_* and bg_* functions how handle zero-length input correctly (#532).

• New function ansi_collapse() to collapse character vectors into a single
  string.

• ansi_strtrim() now handles some edge cases better, when ellipsis has
  length zero, and when it is wider than width.

• New hash_file_md5() function to calculate the MD5 hash of one or more
  files.