sdl12-compat: Update copyright.

From 94f83a3bc94ce2099589cf4f30558cc12b003da2 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Tue, 18 May 2021 11:53:21 -0400
Subject: [PATCH] Update copyright.

---
 include/SDL/SDL.h           | 2 +-
 src/SDL12_compat.c          | 2 +-
 src/SDL12_compat_objc.m     | 2 +-
 src/SDL20_include_wrapper.h | 2 +-
 src/SDL20_syms.h            | 2 +-
 5 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/include/SDL/SDL.h b/include/SDL/SDL.h
index 0cc7fa3..f8a850c 100644
--- a/include/SDL/SDL.h
+++ b/include/SDL/SDL.h
@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
diff --git a/src/SDL12_compat.c b/src/SDL12_compat.c
index 15c5c7e..de95d1a 100644
--- a/src/SDL12_compat.c
+++ b/src/SDL12_compat.c
@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
diff --git a/src/SDL12_compat_objc.m b/src/SDL12_compat_objc.m
index fc2b8fa..2d9346c 100644
--- a/src/SDL12_compat_objc.m
+++ b/src/SDL12_compat_objc.m
@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
diff --git a/src/SDL20_include_wrapper.h b/src/SDL20_include_wrapper.h
index 5c5b460..f9d6c35 100644
--- a/src/SDL20_include_wrapper.h
+++ b/src/SDL20_include_wrapper.h
@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
diff --git a/src/SDL20_syms.h b/src/SDL20_syms.h
index 6db3bad..9246835 100644
--- a/src/SDL20_syms.h
+++ b/src/SDL20_syms.h
@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2019 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages