Security and Performance Improvements

https://join-lemmy.org/news/2023-07-11_-_Lemmy_Release_v0.18.2

Latest Backend (BE) Release Candidate (RC)

• Latest Release Candidate:
  https://github.com/LemmyNet/lemmy/releases/tag/0.18.2
• Compare with previous Release:
  https://github.com/LemmyNet/lemmy/compare/0.18.1...0.18.2
• Compare with release/v0.18:
  https://github.com/LemmyNet/lemmy/compare/0.18.2...release/v0.18

Latest Frontend (UI) Release Candidate (RC)

• Latest Release Candidate:
  https://github.com/LemmyNet/lemmy-ui/releases/tag/0.18.2
• Compare with previous Release:
  https://github.com/LemmyNet/lemmy-ui/compare/0.18.1...0.18.2
• Compare with release/v0.18:
  https://github.com/LemmyNet/lemmy-ui/compare/0.18.2...release/v0.18