Merge tag '4.0.0' into develop

Author: sebastiaanluca

.gitattributes

@@ -0,0 +1,10 @@
+# Reduce Composer package download by removing obsolete files
+
+/.editorconfig      export-ignore
+/.gitattributes     export-ignore
+/.github      export-ignore
+/.gitignore         export-ignore
+/CODE_OF_CONDUCT.md      export-ignore
+/CONTRIBUTING.md      export-ignore
+/phpunit.xml.dist   export-ignore
+/tests              export-ignore