testing/xremap-wlr: upgrade to 0.8.13

https://github.com/k0kubun/xremap/compare/v0.8.12...v0.8.13

assigned to @liliace

added 248 commits

• 05d45039...babbf79b - 247 commits from branch alpine:master
• ac93421b - testing/xremap-wlr: upgrade to 0.8.13

Compare with previous version

merged