jversion.h: Bump copyright year to 2018
diff --git a/jversion.h b/jversion.h
index c050921..2039f44 100644
--- a/jversion.h
+++ b/jversion.h
@@ -4,7 +4,7 @@
  * This file was part of the Independent JPEG Group's software:
  * Copyright (C) 1991-2012, Thomas G. Lane, Guido Vollbeding.
  * libjpeg-turbo Modifications:
- * Copyright (C) 2010, 2012-2017, D. R. Commander.
+ * Copyright (C) 2010, 2012-2018, D. R. Commander.
  * For conditions of distribution and use, see the accompanying README.ijg
  * file.
  *
@@ -36,9 +36,9 @@
  */
 
 #define JCOPYRIGHT \
-  "Copyright (C) 2009-2017 D. R. Commander\n" \
+  "Copyright (C) 2009-2018 D. R. Commander\n" \
   "Copyright (C) 2011-2016 Siarhei Siamashka\n" \
-  "Copyright (C) 2015-2016 Matthieu Darbois\n" \
+  "Copyright (C) 2015-2016, 2018 Matthieu Darbois\n" \
   "Copyright (C) 2015 Intel Corporation\n" \
   "Copyright (C) 2015 Google, Inc.\n" \
   "Copyright (C) 2013-2014 MIPS Technologies, Inc.\n" \
@@ -49,4 +49,4 @@
   "Copyright (C) 1991-2016 Thomas G. Lane, Guido Vollbeding"
 
 #define JCOPYRIGHT_SHORT \
-  "Copyright (C) 1991-2017 The libjpeg-turbo Project and many others"
+  "Copyright (C) 1991-2018 The libjpeg-turbo Project and many others"