HADES development announcements

[mdlavallee92 (Martin Lavallee)]

Capr 2.0.3 has been released. Patch changes in this version include:

• addition of an opAttribute super Class (nice job @mvankessel!)
• add version of purrr (v1.0.1) for list_flatten bug (thanks @Sulev_Reisberg)
• update github workflow versions