Upgrade quanta to v0.11.0

[tatsuya6502]

Fixes #243

This quanta version depends on mach2 crate for macOS/iOS targets as a replacement of unmaintained mach.

[tatsuya6502]

quanta v0.11.0 requires Rust 1.60.

So the CI for Moka's MSRV 1.51 is failing:

   Compiling quanta v0.11.0
error: edition 2021 is unstable and only available with -Z unstable-options.

metrics-rs/quanta@fe14834

-edition = "2018"
+edition = "2021"
+rust-version = "1.60"

2021 Edition was stabilized by Rust 1.56.0 (2021-10-21):

• https://doc.rust-lang.org/edition-guide/rust-2021/index.html
• https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1560-2021-10-21

Rust 1.60 was released on 2022-04-07:

• https://github.com/rust-lang/rust/blob/master/RELEASES.md#version-1600-2022-04-07

In this PR, I will disable the CI for the MSRV (Rust 1.51). And then, I will open another PR to upgrade the MSRV to Rust 1.60.

[tatsuya6502]

I will open another PR to upgrade the MSRV to Rust 1.60.

I opened an issue (not PR) #252.

[tatsuya6502]

And I opened a PR #253.

[tatsuya6502]

Merging.