v0.4.13

Xtals v0.4.13

Diff since v0.4.12

Closed issues:

• Crystal fails w/ ::InlineStrings (#188)
• Strict requirement for _symmetry_equiv_pos_as_xyz column in CIF inputs (#191)

Merged pull requests:

• Add GitHub action "Register Package" (#187) (@singularitti)
• AbstractString (#189) (@eahenle)
• allow alternate symmetry column name (#192) (@eahenle)