Compile with Qt 5.14

Should hopefully fix the CI build.
2 jobs for master in 14 minutes and 46 seconds (queued for 93 minutes and 49 seconds)
Status Job ID Name Coverage
  Build
passed #71970
build_clazy_clang_tidy

00:09:32

passed #71969
linux kf5-qt5 qt5.12

00:05:13

73.0%