atomic-polyfill 1.0.3

Atomic polyfills, for targets where they're not available.
Documentation 
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# Before upgrading check that everything is available on all tier1 targets here:
# https://rust-lang.github.io/rustup-components-history
[toolchain]
channel = "nightly-2023-02-07"
components = [ "rust-src", "rustfmt" ]
targets = [
    "thumbv6m-none-eabi",
    "thumbv7em-none-eabi",
    "riscv32imc-unknown-none-elf",
    "riscv32imac-unknown-none-elf",
    "i686-unknown-linux-gnu",
    "x86_64-unknown-linux-gnu",
    "riscv64gc-unknown-linux-gnu",
]