[neon/forks/pyqt5/Neon/release-lts] /: Update upstream source from tag 'upstream/5.15.4+dfsg'

[Dmitry Shachnev]

Git commit 4c4b6e273c835a5f436417799735d8677dd2e78e by Dmitry Shachnev.
Committed on 10/03/2021 at 17:15.
Pushed by jriddell into branch 'Neon/release-lts'.

Update upstream source from tag 'upstream/5.15.4+dfsg'

Update to upstream version '5.15.4+dfsg'
with Debian dir 786d97ff300d5c89c7dc671c9a9d79465cc20d27


https://invent.kde.org/neon/forks/pyqt5/commit/4c4b6e273c835a5f436417799735d8677dd2e78e