merge default into stable for 5.4 release

--HG--
branch : stable
10 jobs for 5.4rc0 in 39 minutes and 56 seconds (queued for 26 minutes and 55 seconds)
latest
Status Job ID Name Coverage
  Test
passed #68757
checks-py2

00:02:06

passed #68758
checks-py3

00:02:09

passed #68759
rust-cargo-test-py2

00:03:22

passed #68760
rust-cargo-test-py3

00:01:42

passed #68761
test-py2

00:23:30

passed #68763
test-py2-pure

00:22:25

passed #68765
test-py2-rust

00:26:04

passed #68762
test-py3

00:12:26

passed #68764
test-py3-pure

00:13:04

passed #68766
test-py3-rust

00:10:04