Installation: update package sizes as of 2022
Installation: update package sizes as of 2022

The slim version of scalafmt has not been 15 KiB for a long time; the
size of 2.7.5 in October 2020 was 27Kb while 3.3.3 is 123Kb.

scalameta/scalafmt,scalameta/scalafmt,scalameta/scalafmt,scalameta/scalafmt