Add remaining numeric tests from POSIX
Add remaining numeric tests from POSIX

spotify/nu,spotify/nu,hodgeswt/nu,heiko-henrich/nutor,jqk6/nu,heiko-henrich/nutor,gcbeyond/nu,alloy/nu,nulang/nu,gcbeyond/nu,gcbeyond/nu,hodgeswt/nu,alloy/nu,spotify/nu,gcbeyond/nu,jqk6/nu,spotify/nu,nulang/nu,hodgeswt/nu,timburks/nu,heiko-henrich/nutor,nulang/nu,jqk6/nu,hodgeswt/nu,heiko-henrich/nutor,timburks/nu,jqk6/nu,timburks/nu