Update watch file format version to 4.

Changes-By: lintian-brush
Fixes: lintian: older-debian-watch-file-standard
See-also: https://lintian.debian.org/tags/older-debian-watch-file-standard.html

debian/changelog

@@ -1,6 +1,7 @@
 fail2ban (0.11.1-4) UNRELEASED; urgency=medium
 
   * Fix day-of-week for changelog entry 0.5.4-2.
+  * Update watch file format version to 4.
 
  -- Sylvestre Ledru <sylvestre@debian.org>  Mon, 23 Nov 2020 21:47:27 -0000
 

debian/watch

@@ -1,6 +1,2 @@
-# watch control file for uscan
-# Run the "uscan" command to check for upstream updates and more.
-# Site		Directory		Pattern			Version	Script
-version=3
-opts="filenamemangle=s/.*\/(.*)/fail2ban-$1\.tar\.gz/" \
- https://github.com/fail2ban/fail2ban/tags .*archive/(\d[\d\.]+).tar.gz
+version=4
+opts=filenamemangle=s/.*\/(.*)/fail2ban-$1\.tar\.gz/ https://github.com/fail2ban/fail2ban/tags .*archive/(\d[\d\.]+).tar.gz