debian/copyright: fix some issues noticed by Lintian

debian/copyright

@@ -112,13 +112,15 @@ Copyright: 2011 Erick Pérez Castellanos
            2019 Florian Müllner
 License: GPL-2+
 
-Files: lint/eslintrc-gjs.yml
-Copyright: 2018 Claudio André
-License: Expat
+Files: tools/run-eslint.sh
+Copyright: 2020 Philip Chimento
+           2025 Florian Müllner
+License: Expat OR LGPL-2+
 
-Files: lint/eslintrc-shell.yml
-Copyright: 2019 Florian Müllner
-License: Expat
+Files: tools/eslint.config.js
+Copyright: 2020 Philip Chimento
+           2025 Florian Müllner
+License: Expat OR LGPL-2+
 
 Files: build-aux/session-post-install.py
 Copyright: 2021, Neal Gompa
@@ -167,3 +169,25 @@ License: GPL-2+
  .
  On Debian systems, the complete text of the GNU General
  Public License version 2 can be found in "/usr/share/common-licenses/GPL-2".
+
+License: LGPL-2+
+ This library is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by the
+ Free Software Foundation; either version 2 of the License, or (at your
+ option) any later version.
+ .
+ This library is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ for more details.
+ .
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library. If not, see <https://www.gnu.org/licenses/>.
+Comment:
+ The oldest version of the Lesser General Public License under that name
+ was version 2.1.
+ .
+ On Debian systems, the full text of the GNU Lesser General Public License
+ version 2.1 can be found in the file /usr/share/common-licenses/LGPL-2.1,
+ and its predecessor the GNU Library General Public License version 2 can
+ be found in /usr/share/common-licenses/LGPL-2.