chore(deps): bump anyhow and disable its backtrace feature

[LunaBorowska]

Since anyhow 1.0.77, backtrace feature is not needed for Rust 1.65+ (https://github.com/dtolnay/anyhow/releases/tag/1.0.77). Because sentry has a higher MSRV than that, it's no longer necessary to enable this feature.

[Swatinem]

It might not be necessary, but I doubt it hurts to keep it?

I would have to take a closer look at this in any case.

[lcian]

This is legit, also we need to bump anyhow to at least this version due to the changes introduced in #759 which rely on it.
At the moment, if someone has a too low version of anyhow in their lockfile, sentry-anyhow will fail to compile.

error[E0599]: no method named `status` found for reference `&impl std::fmt::Debug + std::fmt::Display` in the current scope
  --> /Users/lcian/repos/sentry-rust/sentry-anyhow/src/lib.rs:76:27
   |
76 |                 backtrace.status(),
   |                           ^^^^^^ method not found in `&impl Debug + Display`

sentry-anyhow on its own compiles fine because we have 1.0.98 in the lockfile of this repo.