Merge branch '65-port-to-sip-4-19' into 'master'

Update to SIP 4.19 and build for python 2 on Linux

See merge request !6
3 jobs for master in 6 minutes and 34 seconds (queued for 3 seconds)
Status Name Job ID Coverage
  Build
passed build-linux #15240
linux

00:05:05

 
  Build Noarch
passed build-noarch #15241
conda

00:00:35

 
  Deploy
passed deploy-devel #15242
conda linux manual

00:00:53