DOC: Add a release note for the `np.MachAr` deprecation
DOC: Add a release note for the `np.MachAr` deprecation

seberg/numpy,endolith/numpy,numpy/numpy,endolith/numpy,seberg/numpy,anntzer/numpy,mhvk/numpy,jakirkham/numpy,jakirkham/numpy,numpy/numpy,numpy/numpy,mattip/numpy,jakirkham/numpy,charris/numpy,rgommers/numpy,mhvk/numpy,rgommers/numpy,mattip/numpy,endolith/numpy,pdebuyl/numpy,anntzer/numpy,charris/numpy,mhvk/numpy,pdebuyl/numpy,mattip/numpy,mhvk/numpy,rgommers/numpy,mhvk/numpy,pdebuyl/numpy,numpy/numpy,anntzer/numpy,seberg/numpy,pdebuyl/numpy,anntzer/numpy,charris/numpy,jakirkham/numpy,endolith/numpy,rgommers/numpy,mattip/numpy,charris/numpy,jakirkham/numpy,seberg/numpy