Log Message:
xprop: update to 1.2.6.

Alan Coopersmith (10):
      Fix spelling/wording issues
      gitlab CI: add a basic build test
      Build xz tarballs instead of bzip2
      gitlab CI: stop requiring Signed-off-by in commits
      Mark help(), usage(), and grammar() with _X_NORETURN _X_COLD
      Declare help() and print_help() as static
      Rename "dpy" function arguments to "display" to avoid \ 
shadowing global
      Resolve many gcc -Wsign-compare warnings
      Variable scope reductions as suggested by cppcheck
      xprop 1.2.6