Release v3.18.3

This release fixes a series of bugs and includes improvements into tests and testlibrary API.

Bug fixes:
 - Better exit codes and failure messages for swupd commands
 - Documentation improvement adding information about os-format in manpages and
   systemd unitdir build option in swupd -v
 - Using a more robust string to integer conversion in order to prevent overflows
 - Report files removed by --picky in verify summary
 - Fix verify --fix bug when downgrading to a version with missing bundles.
 - Fix memory leaks and invalid memory access when using time report (-t)
 - Adding more probes to time report (report total time and post-install script
   execution.
 - Removing deprecated code for handling the deprecated and unused manifest
   deltas

Tests:
 - Improvement in testlib documentation
 - Adding more tests
 - Bug fixes in testlib API
 - Support for running tests in a proxy environment
 - Webserver consolidation

Signed-off-by: Otavio Pontes <[email protected]>

Author: Otavio Pontes

configure.ac

@@ -2,7 +2,7 @@
 # Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.66])
-AC_INIT(swupd-client, 3.18.2, [email protected])
+AC_INIT(swupd-client, 3.18.3, [email protected])
 AM_PROG_AR
 LT_INIT
 AC_CONFIG_MACRO_DIR([m4])