Change logs for m4 source package in Bullseye

m4 (1.4.18-5) unstable; urgency=medium

  * Remove date from generated html and info files. Closes: #950419.
    Thanks to Vagrant Cascadian.
  * Raise debhelper compatibility version from 9 to 10.
  * Use https in homepage, copyright and watchfile.

 -- Santiago Vila <email address hidden>  Tue, 05 Jan 2021 23:34:00 +0100