NEP: Regenerate table in NEP 29 (add numpy 1.18 and 1.19 to list) (#17337)
NEP: Regenerate table in NEP 29 (add numpy 1.18 and 1.19 to list) (#17337)

* Regenerate Table for NEP 29.

Numpy 1.18 and 1.19 have been released, which add two new recommended
stop date for recommended numpy support in 2021 and 2022.

* Infer next version as max-known-minor-version+1

Do not print the first 4 entries to be dropped; as they are pre-nep-29
grlee77/numpy,pbrod/numpy,rgommers/numpy,grlee77/numpy,pdebuyl/numpy,rgommers/numpy,rgommers/numpy,grlee77/numpy,endolith/numpy,mhvk/numpy,jakirkham/numpy,pbrod/numpy,madphysicist/numpy,madphysicist/numpy,simongibbons/numpy,numpy/numpy,mattip/numpy,endolith/numpy,pbrod/numpy,seberg/numpy,mhvk/numpy,seberg/numpy,mhvk/numpy,charris/numpy,mattip/numpy,pbrod/numpy,madphysicist/numpy,seberg/numpy,jakirkham/numpy,jakirkham/numpy,numpy/numpy,pbrod/numpy,numpy/numpy,pdebuyl/numpy,simongibbons/numpy,anntzer/numpy,endolith/numpy,charris/numpy,mattip/numpy,rgommers/numpy,jakirkham/numpy,madphysicist/numpy,grlee77/numpy,mhvk/numpy,anntzer/numpy,simongibbons/numpy,endolith/numpy,pdebuyl/numpy,pdebuyl/numpy,jakirkham/numpy,numpy/numpy,anntzer/numpy,charris/numpy,simongibbons/numpy,charris/numpy,seberg/numpy,anntzer/numpy,simongibbons/numpy,grlee77/numpy,madphysicist/numpy,mattip/numpy,mhvk/numpy