MAINT: updated 1.3.0 release notes
MAINT: updated 1.3.0 release notes

* forward-port changes to SciPy 1.3.0
release notes after "final" release off
maintenance branch

mdhaber/scipy,Eric89GXL/scipy,Eric89GXL/scipy,endolith/scipy,tylerjereddy/scipy,endolith/scipy,zerothi/scipy,anntzer/scipy,ilayn/scipy,ilayn/scipy,jamestwebber/scipy,perimosocordiae/scipy,zerothi/scipy,arokem/scipy,vigna/scipy,perimosocordiae/scipy,aarchiba/scipy,scipy/scipy,pizzathief/scipy,grlee77/scipy,scipy/scipy,endolith/scipy,jamestwebber/scipy,jor-/scipy,grlee77/scipy,WarrenWeckesser/scipy,andyfaff/scipy,person142/scipy,jor-/scipy,mdhaber/scipy,aeklant/scipy,endolith/scipy,arokem/scipy,matthew-brett/scipy,lhilt/scipy,e-q/scipy,lhilt/scipy,andyfaff/scipy,rgommers/scipy,anntzer/scipy,WarrenWeckesser/scipy,WarrenWeckesser/scipy,ilayn/scipy,matthew-brett/scipy,perimosocordiae/scipy,WarrenWeckesser/scipy,lhilt/scipy,nmayorov/scipy,lhilt/scipy,zerothi/scipy,rgommers/scipy,aeklant/scipy,ilayn/scipy,e-q/scipy,mdhaber/scipy,ilayn/scipy,aeklant/scipy,arokem/scipy,tylerjereddy/scipy,tylerjereddy/scipy,rgommers/scipy,andyfaff/scipy,jor-/scipy,matthew-brett/scipy,anntzer/scipy,mdhaber/scipy,perimosocordiae/scipy,zerothi/scipy,jamestwebber/scipy,Stefan-Endres/scipy,andyfaff/scipy,vigna/scipy,pizzathief/scipy,jor-/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,aeklant/scipy,Stefan-Endres/scipy,rgommers/scipy,scipy/scipy,arokem/scipy,vigna/scipy,Eric89GXL/scipy,aarchiba/scipy,mdhaber/scipy,grlee77/scipy,person142/scipy,scipy/scipy,scipy/scipy,aarchiba/scipy,Eric89GXL/scipy,jamestwebber/scipy,lhilt/scipy,person142/scipy,tylerjereddy/scipy,andyfaff/scipy,andyfaff/scipy,jor-/scipy,matthew-brett/scipy,ilayn/scipy,Eric89GXL/scipy,scipy/scipy,anntzer/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,grlee77/scipy,e-q/scipy,perimosocordiae/scipy,nmayorov/scipy,pizzathief/scipy,WarrenWeckesser/scipy,grlee77/scipy,aarchiba/scipy,arokem/scipy,e-q/scipy,WarrenWeckesser/scipy,person142/scipy,Eric89GXL/scipy,anntzer/scipy,gertingold/scipy,tylerjereddy/scipy,rgommers/scipy,pizzathief/scipy,person142/scipy,nmayorov/scipy,Stefan-Endres/scipy,mdhaber/scipy,aarchiba/scipy,anntzer/scipy,pizzathief/scipy,jamestwebber/scipy,gertingold/scipy,matthew-brett/scipy,nmayorov/scipy,vigna/scipy,e-q/scipy,nmayorov/scipy,aeklant/scipy,gertingold/scipy,zerothi/scipy,gertingold/scipy,endolith/scipy,endolith/scipy,zerothi/scipy,gertingold/scipy,vigna/scipy