[ImgBot] Optimize images

[imgbot[bot]]

Beep boop. Your images are optimized!

Your image file size has been reduced by 19% 🎉

Details

File	Before	After	Percent reduction
/img/readme/slack-dark-128.png	6.45kb	4.18kb	35.30%
/img/readme/Layer5-MeshMates.png	48.19kb	39.90kb	17.21%
Total :	54.65kb	44.08kb	19.34%

---

📝 docs | :octocat: repo | 🙋🏾 issues | 🏪 marketplace

~Imgbot - Part of Optimole family