Release v1.4.0

Feature release

Fix filename and density range with dos-local.pdf output
Fix unintuitive handling of single carrier density and ranges of densities (cardens command line option)
Fix incorrect verbose output for BHZ parameters B and D
Silence warnings for numpy.where()
Eliminate error messages “Some parameters for material (…) did not evaluate to a numerical value” when reading from an XML file

Version requirement for Python is raised to 3.11
Version requirements are raised for imported packages (NumPy, SciPy, etc.)
Add type annotations in large parts of the source code
Command line arguments can no longer be parsed twice (with a few exceptions)
Change the mechanism to set the configuration values in the parallelized computing parts, re-parsing no longer needed
Refactor implementation of wave function output (plots and tables): minor changes in band labels and file names, restrict output to energy range
Streamline wave function output in kdotpy 1d: separate run no longer required
Set number of threads at runtime instead of at import

Use kdotpy by invoking kdotpy.run() with a list of command line argument in a Python script or the interactive interpreter
Improve the command line interface: Using --argument or putting -- between the arguments (both optional) prevents misinterpretation of commands
Parsing information of command line arguments is saved in the XML output file
Add the command line argument config default to reset the configuration options to their default values
Material parameter renormalization, in order to deal with spurious solutions
Add SLEPc as diagonalization solver

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