Auto merge of #2540 - jtgeibel:update-backend-deps, r=JohnTitor

Update more backend dependencies

The first 5 commits mirror recent version bumps done in #2488, #2467, and #2535. Since these were recently bumped they should be low risk.

Additionally, the following dependencies are bumped: `ring`, `base64`, `curl`, `curl-sys`, and some `diesel` dependencies (`migrations_internals`, `migrations_macros`, `pq-sys`, `scheduled-thread-pool`).

r? @JohnTitor

Author: bors