Release Macaulay2 1.24.05

Release version 1.23

Merge pull request #3147 from d-torrance/atomic-doc

Fix typo in compareExchange docs (z is stored in x, not y)

Merge pull request #2878 from d-torrance/syntax-highlighting

Update prism.js symbols for version 1.22.

Merge branch 'release-1.21-branch' of github.com:Macaulay2/M2 into re…

…lease-1.21-branch

also build factory on mac os x

update changes log for 1.19.1

update VERSION-README

my makefile

bump version number to 1.18