Added gitattributes file; Updated year in license

Author: korridor

.gitattributes

@@ -0,0 +1,11 @@
+/tests              export-ignore
+/phpunit.xml        export-ignore
+/phpunit.xml.old    export-ignore
+/phpcs.xml          export-ignore
+/docker             export-ignore
+/.travis.yml        export-ignore
+/.styleci.yml       export-ignore
+/.php_cs            export-ignore
+/.editorconfig      export-ignore
+/.gitattributes     export-ignore
+/.gitignore         export-ignore

license.md

@@ -1,7 +1,7 @@
 The MIT License (MIT)
 =====================
 
-Copyright © `2019` `korridor`
+Copyright © `2021` `korridor`
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation