Changelog for Mendeleev.jl

v1.0 (29.06.2023)

This is a non-breaking update from v0.3. It is based on Python mendeleev v0.14

• Update boiling and melting point data and add triple point and critical temperature and pressure
• Fix Mulliken electronegativity
• Add MendUp sub-project for updating Mendeleev.jl from Python mendeleev (to be used by maintainers only, not documented yet)