unable to build for some platforms that does not support AtomicU64

[delta4chat]

because moka internally uses some 64-bit atomic types from standard library, but it is not found in some 32-bit processors.
you can use portable-atomic for support these platforms.

https://docs.rs/portable-atomic

cargo add moka --no-default-features -F future,logging,atomic64,quanta

cross build --release --target mipsel-unknown-linux-musl

error[E0432]: unresolved import "std::sync::atomic::AtomicU64"
 --> /cargo/registry/src/index.crates.io-6f17d22bba15001f/moka-0.12.8/src/common/concurrent/atomic_time/atomic_time.rs:5:20
  |
5 |     sync::atomic::{AtomicU64, Ordering},
  |                    ^^^^^^^^^
  |                    |
  |                    no "AtomicU64" in "sync::atomic"
  |                    help: a similar name exists in the module: "AtomicU32"