cli 3.3.0

• style_hyperlink() no longer breaks if the env varible VTE_VERSION
  is of the form \d{4}, i.e., 4 consecutive numbers (#441, @MichaelChirico)

• ansi_*() functions support ANSI hyperlinks again (#444).

• Turning off ANSI colors via the cli.num_colors option or the
  R_CLI_NUM_COLORS or the NO_COLOR environment variable now also turns off
  ANSI hyperlinks (#447).

• symbol now only has two variants: UTF-8 and ASCII. There are no special
  variants for RStudio and Windows RGui any more (#424).