v2020.12.3

• Site insertion algorithm based on charge density (@jmmshn, #1997)
• Allow calculation of Fermi level from occupancies in VASP calculation (@rkingsbury, #2000)
• Improvement to legibility of 3D phase diagram plots (@bayesfactor, #1999)
• Improvement to allow general input for exciting (@vorwerkc, #1975)
• Improvements to code formatting (@mkhorton, #2008)
• Bug fix for VASP run type detection (@rkingsbury, #1996)