Update ChangeLog, abi-check.sh, AUTHORS and issues_closed list for an upcoming 0.19 release.

AUTHORS

@@ -4,10 +4,14 @@ Alexander Dahl <post@lespocky.de>
 Alexandru Ardelean <ardeleanalex@gmail.com>
 An7ar35 <eadavison@protonmail.com>
 andy5995 <andy400-dev@yahoo.com>
+Anton Lundin <glance@ac2.se>
 Aram Poghosyan <Aram.Poghosyan@teamviewer.com>
+Awildidiot <69577313+0xfadead@users.noreply.github.com>
 Björn Esser <besser82@fedoraproject.org>
 BonsaY <bonsay@posteo.de>
 Bruno Haible <bruno@clisp.org>
+Cameron Armstrong <cameronscottarmstrong@gmail.com>
+Careles <zhancheng1996@gmail.com>
 changyong guo <guo1487@163.com>
 chenguoping <chenguopingdota@163.com>
 Chris Lamb <lamby@debian.org>
@@ -22,12 +26,14 @@ Dimitri Papadopoulos <3234522+DimitriPapadopoulos@users.noreply.github.com>
 dota17 <chenguopingdota@163.com>
 Eric Haszlakiewicz <erh+git@nimenees.com>
 Eric Hawicz <erh+git@nimenees.com>
+Evan Si <evsi@amazon.com>
 Even Rouault <even.rouault@spatialys.com>
 evo <149657734+evo-i@users.noreply.github.com>
 Fabrice Fontaine <fontaine.fabrice@gmail.com>
 Federico Francescon <federico.francescon@higeco.com>
 Gianluigi Tiesi <sherpya@netfarm.it>
 grdowns <grdowns@microsoft.com>
+Guilhem Saurel <guilhem.saurel@laas.fr>
 HansolChoe <hansol614@gmail.com>
 Hex052 <elijahiff@gmail.com>
 hofnarr <hofnarr@hofnarr.fi>
@@ -36,6 +42,7 @@ Ivan Romanov <drizt@land.ru>
 Jaap Keuter <jaap.keuter@xs4all.nl>
 Jakov Smolic <jakov.smolic@sartura.hr>
 janczer <menshikov.ivn@gmail.com>
+Ján Tomko <jtomko@redhat.com>
 JC (Jonathan Chen) <jc@dijonkitchen.org>
 Jehan <jehan@girinstud.io>
 Jehiah Czebotar <jehiah@gmail.com>
@@ -46,6 +53,7 @@ Juuso Alasuutari <juuso.alasuutari@gmail.com>
 Keith Holman <keith.holman@windriver.com>
 Khem Raj <raj.khem@gmail.com>
 Kizuna-Meraki <z9@kizunameraki.de>
+Lakshmi-Surekha <Lakshmi.Kovvuri@ibm.com>
 Leon Gross <leon.gross@rub.de>
 Liang, Gao <liang.gao@intel.com>
 Luca Mannella <luca.mannella@studenti.polito.it>
@@ -54,6 +62,7 @@ Matthias Gatto <matthias.gatto@protonmail.com>
 max <mpano91@gmail.com>
 Micah Snyder <micasnyd@cisco.com>
 Michael Clark <michael@metaparadigm.com>
+Michele Locati <michele@locati.it>
 myd7349 <myd7349@gmail.com>
 Pascal Cuoq <cuoq@trust-in-soft.com>
 Pavel Zwerschke <pavelzw@gmail.com>
@@ -70,10 +79,16 @@ Rolf Eike Beer <eb@emlix.com>
 Rosen Penev <rosenp@gmail.com>
 Rubasri Kalidas <rubasri.kalidas@intel.com>
 Sergey Sharshunov <s.sharshunov@gmail.com>
+Shane F. Carr <shane@unicode.org>
 Simon McVittie <smcv@collabora.com>
+Simon Resch <simon.resch@code-intelligence.de>
+Simon Sobisch <simonsobisch@web.de>
 ssrlive <30760636+ssrlive@users.noreply.github.com>
+Timothée Ravier <tim@siosm.fr>
 Tobias Nießen <tniessen@users.noreply.github.com>
 Tobias Stoeckmann <tobias@stoeckmann.org>
 Tudor Brindus <me@tbrindus.ca>
+Tyler Erickson <tyler.erickson@seagate.com>
+Tyler Erickson <vonericsen@gmail.com>
 Unmanned Player <36690541+unmanned-player@users.noreply.github.com>
 Yurii Rashkovskii <yrashk@gmail.com>