switch linux 3.5 CI jobs to 3.7

17 jobs for master in 6 minutes and 9 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #84404
Linux
build-2.7-linux

00:01:22

passed #84405
Apple
build-2.7-macos

00:02:33

passed #84403
Apple
build-3.5-macos

00:02:38

passed #84401
python37 VS2017
build-3.7-VS2017

00:01:22

passed #84402
Linux
build-3.7-linux

00:01:23

 
  Test
passed #84409
Linux
test-2.7-linux

00:00:10

passed #84410
Apple
test-2.7-macos

00:00:13

passed #84408
Apple
test-3.5-macos

00:00:16

passed #84406
python37 VS2017
test-3.7-VS2017

00:00:18

passed #84407
Linux
test-3.7-linux

00:00:11

 
  Deploy
passed #84414
Linux
deploy-2.7-linux

00:00:02

passed #84415
Apple
deploy-2.7-macos

00:00:01

passed #84413
Apple
deploy-3.5-macos

00:00:01

passed #84411
python37 VS2017
deploy-3.7-VS2017

00:00:02

passed #84412
Linux
deploy-3.7-linux

00:00:01

passed #84417
Linux
deploy-documentation

00:00:22

passed #84416
Linux
deploy-sdist

00:00:11