restore composer.json, add mysqli extension

public/vendor/fileinput/.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,16 @@
+## Scope
+This pull request includes a
+
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Translation
+
+## Changes
+The following changes were made
+
+-
+-
+-
+
+## Related Issues
+If this is related to an existing ticket, include a link to it as well.