v0.19.0

What's Changed

• [FIX] Correct the electronic configuration for Lr by @lmmentel in #190
• [FIX] Typo in changelog by @lmmentel in #196
• [MNT] Add dependency caching in CI by @lmmentel in #197
• [MNT] Improve performance of fetch_electronegativity by @lmmentel in #198
• [MNT] Bump versions of dev dependencies by @lmmentel in #200
• [MNT] Add pytest-xdist to dev deps and configure to use all cores by @lmmentel in #201
• [ENH] Update ionization energy data and metadata from NIST ASD by @lmmentel in #192
• [DOC] Update docs for atomic scattering factor by @lmmentel in #203
• [FIX] Update values of oxidation states by @lmmentel in #202
• [ENH] Add Miedema's scale of electronegativity by @lmmentel in #204
• [ENH] Improve data export by @lmmentel in #205
• [FIX] Fix footnotes on data doc page by @lmmentel in #206

Full Changelog: v0.18.1...v0.19.0