healpy 1.15.0 released

Just released healpy 1.15.0, this is a large release with many important changes, please test and open issues at https://github.com/healpy/healpy/issues

• New viz function projview based on plain matplotlib, with lon/lat labels and more https://healpy.readthedocs.io/en/latest/newvisufunc_example.html
• Finally new default for I/O: write_map keeps dtype of input map array instead of float32, read_map keeps dtype of FITS file instead of upcasting to float64, write_cl uses dtype of input cl instead of float64, see discussion in https://github.com/healpy/healpy/pull/688
• Changed all warnings to using the logging module, deprecated all verbose keywords , see the docs https://healpy.readthedocs.io/en/latest/#verbosity
• Dropped support for Python 2 and 3.5, use 1.14.0 if you need it
• Binary packages on PyPI and conda-forge for the Linux and MacOS
• All other changes at https://github.com/healpy/healpy/blob/main/CHANGELOG.rst
• As usual, remember to cite our JOSS paper https://joss.theoj.org/papers/10.21105/joss.01298