New version: Manifolds v0.10.6

[JuliaRegistrator]

• Registering package: Manifolds
• Repository: https://github.com/JuliaManifolds/Manifolds.jl
• Created by: @kellertuer
• Version: v0.10.6
• Commit: d1d4166d85c172f627b2f9d2fe74762844de79a5
• Reviewed by: @kellertuer
• Reference: JuliaManifolds/Manifolds.jl@d1d4166#commitcomment-148807389
• Description: Manifolds.jl provides a library of manifolds aiming for an easy-to-use and fast implementation.
• Release notes:

### Added

* Two new actions: `ComplexPlanarRotation`, `QuaternionRotation`.
* New function `quaternion_rotation_matrix` for converting quaternions to rotation matrices.
* `make.jl` script now has more command line arguments, for example `--exclude-tutorials` when you do not want to build the tutorials but still look at the docs. See `make.jl --help` for more information.

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