xrestop 0.6

Alan Coopersmith (10):

• gitlab CI: add a basic build test
• Build xz tarballs instead of bzip2
• Use AC_CONFIG_FILES to replace the deprecated AC_OUTPUT with parameters
• configure: remove unnecessary checks
• configure: remove fallback for pre-pkg-config systems
• gitlab CI: stop requiring Signed-off-by in commits
• Fix builds on Solaris
• Add --version option
• man page: stop saying the X-Resource extension is "very new"
• xrestop 0.6

Matt Turner (1):

• Link with libtinfo if available

Thomas Kuehne (1):

• Fixes -Wformat warning in xrestop_display