Use PEP 508 compliant env markers for install deps
Use PEP 508 compliant env markers for install deps

As title.

Fixes #4103

gmarkall/numba,seibert/numba,numba/numba,sklam/numba,numba/numba,cpcloud/numba,sklam/numba,stuartarchibald/numba,stonebig/numba,seibert/numba,cpcloud/numba,cpcloud/numba,numba/numba,jriehl/numba,stuartarchibald/numba,sklam/numba,numba/numba,jriehl/numba,numba/numba,IntelLabs/numba,IntelLabs/numba,cpcloud/numba,jriehl/numba,stonebig/numba,jriehl/numba,cpcloud/numba,IntelLabs/numba,sklam/numba,stonebig/numba,gmarkall/numba,jriehl/numba,sklam/numba,stonebig/numba,IntelLabs/numba,IntelLabs/numba,stuartarchibald/numba,gmarkall/numba,seibert/numba,stonebig/numba,gmarkall/numba,seibert/numba,gmarkall/numba,stuartarchibald/numba,stuartarchibald/numba,seibert/numba