Include vendor directory

vendor/maennchen/zipstream-php/.github/PULL_REQUEST_TEMPLATE/FIX.md

@@ -0,0 +1,13 @@
+<!---
+name: 🐞 Bug Fix
+about: You have a fix for a bug?
+labels: bug
+--->
+
+<!--
+- Please do not send a pull request for an issue in a version of ZipStream-PHP
+  that is no longer supported.
+  See: https://github.com/maennchen/ZipStream-PHP#version-support
+- Please target the oldest branch of ZipStream-PHP that is still supported and
+  affected by this bug.
+-->