Auto merge of #3153 - jtgeibel:rustc/1.49, r=jtgeibel
Auto merge of #3153 - jtgeibel:rustc/1.49, r=jtgeibel

Bump to latest stable rustc

I'll merge and deploy this soon.

r? `@ghost`

rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io