* fix typo in variable name in hepmc3 variant
* set cxx standard to 14 when using protobuf
* add myself to hepmc3 maintainer list
* hepmc3: Applied suggestion of @acecbs for spec.satisfies("+protobuf") (agreed!)
Co-authored-by: Alec Scott <hi@alecbcs.com>
* hepmc3: cxx_standard for protobuf
only set cxx standard to meet protobuf minimum (14) if not also rootio variant as that sets the cxx standard to match the root public API standard requirements
de0d5ba883