v0.7.0

Manifolds v0.7.0

Diff since v0.6.9

Closed issues:

• Adding Zygote compatibility (#42)
• Add FiniteDiff as a backend for jacobians. (#88)
• Switch from ProductRepr and ProductArray to ArrayPartition (#402)
• retract, Stiefel, QRRetraction is temparamental (#433)

Merged pull requests:

• Polish Diff Interfaces (V2) (#432) (@kellertuer)
• Remove ProductArray (#435) (@mateuszbaran)
• add projection on tangent spaces for SPDs. (#437) (@kellertuer)