[TASK] Do not package development-only files

Author: oliverklee

.gitattributes

@@ -0,0 +1,8 @@
+# Please keep the lines in this file sorted.
+/.editorconfig export-ignore
+/.gitattributes export-ignore
+/.github/ export-ignore
+/.gitignore export-ignore
+/build.xml export-ignore
+/phpcs.xml export-ignore
+/tests export-ignore