Update year-range in license file

Alhadis · Alhadis · commit 05e1b34d3284 · 2021-03-14T04:47:09.000+11:00
diff --git a/LICENSE.md b/LICENSE.md
@@ -1,4 +1,4 @@
-Copyright (c) 2016-2019, John Gardner
+Copyright (c) 2016-2021, John Gardner
 
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted, provided that the above

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-Copyright (c) 2016-2019, John Gardner`
	`1`	`+Copyright (c) 2016-2021, John Gardner`
`2`	`2`
`3`	`3`	`Permission to use, copy, modify, and/or distribute this software for any`
`4`	`4`	`purpose with or without fee is hereby granted, provided that the above`