Release of v5.1.1-alpha1

Move all banners to GitHub. Adds library phpspreadsheet to JCB. Adds import item example to demo component. Updates the Superpower class with the GetRemote class in the plugin. Ensures the super power autoloader triggers the correct repositories.

libraries/phpspreadsheet/vendor/markbaker/matrix/phpstan.neon

@@ -0,0 +1,6 @@
+parameters:
+    ignoreErrors:
+        - '#Property [A-Za-z\\]+::\$[A-Za-z]+ has no typehint specified#'
+        - '#Method [A-Za-z\\]+::[A-Za-z]+\(\) has no return typehint specified#'
+        - '#Method [A-Za-z\\]+::[A-Za-z]+\(\) has parameter \$[A-Za-z0-9]+ with no typehint specified#'
+    checkMissingIterableValueType: false