Ignore /.github

Author: koriym

.gitattributes

@@ -1,6 +1,5 @@
 # Exclude build/test files from archive.
 /tests                           export-ignore
-/demo                            export-ignore
 /vendor-bin                      export-ignore
 /.gitattributes                  export-ignore
 /.gitignore                      export-ignore
@@ -11,6 +10,7 @@
 /phpstan.neon                    export-ignore
 /phpunit.xml.dist                export-ignore
 /psalm.xml                       export-ignore
+/.github                         export-ignore
 
 # Configure diff output for .php and .phar files.
 *.php diff=php