JuliaMolSim/DFTK.jl: v0.2.7

DFTK v0.2.7 Diff since v0.2.6 Closed issues: Integrate with Xtals.jl (#389) dVol as a field (#414) Pymatgen namespaces change v2022.0.0 (#418) Merged pull requests: Do a Rayleigh-Ritz at the end of direct minimization (#411) (@antoine-levitt) Fix GGA non-spin-polarised XC kernel (#412) (@mfherbst) Replace ForwardDiff by manual forces (#415) (@niklasschmitz) CompatHelper: bump compat for "Polynomials" to "2.0" (#416) (@github-actions[bot]) Suppress conditional package load warnings (#419) (@mfherbst