v0.6.13

DFTK v0.6.13

Diff since v0.6.12

Merged pull requests:

• Switching to TestItemRunner (#888) (@epolack)
• Update test selection mechanism (#901) (@mfherbst)
• Update Spglib (#903) (@mfherbst)
• Bump minimal Julia version to 1.8 (#905) (@mfherbst)
• Add cutoff parameter to PspUpf (#906) (@azadoks)

Closed issues:

• Use TestItemRunner.jl for managing tests (#866)