chore: update license list (#9436)

go run scripts/generate-licenses.go

Co-authored-by: zeripath <art27@cantab.net>

options/license/libpng-2.0

@@ -0,0 +1,34 @@
+PNG Reference Library License version 2 ---------------------------------------
+
+   * Copyright (c) 1995-2018 The PNG Reference Library Authors.
+
+   * Copyright (c) 2018 Cosmin Truta.
+
+   * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson.
+
+   * Copyright (c) 1996-1997 Andreas Dilger.
+
+   * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
+
+The software is supplied "as is", without warranty of any kind, express or
+implied, including, without limitation, the warranties of merchantability,
+fitness for a particular purpose, title, and non-infringement. In no even
+shall the Copyright owners, or anyone distributing the software, be liable
+for any damages or other liability, whether in contract, tort or otherwise,
+arising from, out of, or in connection with the software, or the use or other
+dealings in the software, even if advised of the possibility of such damage.
+
+Permission is hereby granted to use, copy, modify, and distribute this software,
+or portions hereof, for any purpose, without fee, subject to the following
+restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim
+that you wrote the original software. If you use this software in a product,
+an acknowledgment in the product documentation would be appreciated, but is
+not required.
+
+2. Altered source versions must be plainly marked as such, and must not be
+misrepresented as being the original software.
+
+3. This Copyright notice may not be removed or altered from any source or
+altered source distribution.