[notmuch/f21] (7 commits) ...Revision bump

[Luke Macken]

Summary of changes:

  7880d84... Update to 0.18.1 (#1094701) (*)
  e480131... Add bash-completion to the build requirements (*)
  357972f... Add python-docutils to the build requirements for the manpa (*)
  64ba88b... Add emacs to the build requirements for the emacs-notmuch s (*)
  0ef42fc... Update the changelog (*)
  9d5e62c... Build a ruby-notmuch subpackage (#947571) (*)
  170ccd0... Revision bump (*)

(*) This commit already existed in another branch; no separate mail sent