Fast update calculation for eigenvalues

[stratixs]

The premise of these features is an algorithm for the update of eigenvalues based on a rank-one perturbation by Gu and Eisenstat. A change to the interaction strength between two atoms can be described by a rank-one update. The algorithm itself is implemented in LAPACK's DLAED4 routine but needs a cython wrapper to access. The new feature allows fast calculation of updated frequencies msqf/dcc with subsets.

Changes

• Cython wrapper for LAPACK's DLAED4 routinee to update the eigenvalues and corresponding eigenvectors.
• Added frequencies_update() and allows msqf, bfactor and dcc update methods to accept subsets.
• Modified test and deployment pipelines to build and test on different operating systems (which is required for cython compilation)