There are 3 main updates in this release since 1.3.9:
1. The ``nastran.op2`` module has been enhanced, especially the `rdparampost` routine. It can now read more data blocks, many of which are returned in pandas DataFrames. This is a step forward in this ongoing project.
a. Note that this update isn't completely backwards compatible. For a short time, `rdparampost_old` will be available to help give users time to transition to the new routine.
3. The ``cla.DR_Event.apply_uf`` routine has been updated to prevent coupling between rigid-body modes, normal modes, and residual flexibility modes. Efficiency has been improved as well.
4. The DataCursor has been updated to (hopefully) be more user-friendly and efficient.
Support for Python versions older than 3.8 has been officially dropped.