Support rtic by implementing Monotonic trait for relevant types #293
Description
See https://github.com/rtic-rs/cortex-m-rtic/blob/master/book/en/src/by-example/tips_monotonic_impl.md for background information.
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See https://github.com/rtic-rs/cortex-m-rtic/blob/master/book/en/src/by-example/tips_monotonic_impl.md for background information.