Bump version to v1.5.0

Changes since v1.4.0:

!144  seccomp: Allow `SYS_sigreturn` for s390x                 (main) ← (fix-s390x-crash)
!143  passthrough: Set `RWF_APPEND` on non-cached writes o...  (main) ← (fix-append-mmap)
!142  keep `DAC_OVERRIDE` after changing the uid/gid           (main) ← (fix-supgroup)
!141  passthrough: Replace `openat(2)` with `openat2(2)`       (main) ← (feat-openat2)
!140  Keep DAC_READ_SEARCH on setxattr with posix acl          (main) ← (fix-setxattr-w-filehandles)
!139  Bump rust-vmm crates dependencies                        (main) ← (update-rust-vmm)
!138  descriptor_utils: Remove unnecessary deref               (main) ← (fix-clippy-warn)
!136  sandbox: Allow non-root users run the daemon without...  (main) ← (sandbox-none-non-root)
!135  Add `umask(2)` safe wrapper                              (main) ← (ref-safe-umask)
!134  Add command line documentation details                   (main) ← (fix-cmdline-doc)
!133  Add missing license file header                          (main) ← (fix-licence-headers)
!132  Fix `listxattr()` response when xattr name list is e...  (main) ← (fix-listxattr-response)
!131  Add fchdir safe wrapper                                  (main) ← (ref-wrap-unsafe-fchdir)
!130  Add ppc64le arch support                                 (main) ← (add-ppc64)
!129  Bump vhost-user-backend and virtio-queue dependencies    (main) ← (bump_deps)
!127  Adds safe versions of `libc::mount()` and `libc::umo...  (main) ← (ref-wrap-unsafe-mount)

Signed-off-by: Sergio Lopez slp@redhat.com