Projects: Update to LCG_106b_ATLAS_3
This MR updates the main branch Projects
to LCG_106b_ATLAS_3
(SPI-2708) with the updates listed at https://lcginfo.cern.ch/compare_releases/None/106b_ATLAS_1/106b_ATLAS_3 and the versions here:
- herwig3 7.3.0p1
- madgraph5amc 3.5.7.atlas11
- openloops 2.1.3p2
- pythia8 313
- superchic 5.4
- thepeg 2.3.0
Tagging @ewelina, @jcatmore, @jchapman for info and further feedback.