feat: add defmt and add rust-version (MSRV) of 1.62 #24

	name: Rust

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	env:
	CARGO_TERM_COLOR: always

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- name: Install Rust (thumbv7em)
	uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: nightly
	override: true
	target: thumbv7em-none-eabihf
	components: clippy
	- name: Checkout Sources
	uses: actions/checkout@v2
	- name: Build - default features
	run: cargo build
	- name: Build - std
	run: cargo build --features "std"
	- name: Build - serde
	run: cargo build --features "serde"
	- name: Build - examples
	run: cargo build --examples
	- name: Test - docs
	run: cargo test --doc
	- name: Clippy
	uses: actions-rs/clippy-check@v1
	with:
	token: ${{ secrets.GITHUB_TOKEN }}
	args: --all-features
	- name: Fuzz
	run: \|
	cargo install cargo-fuzz
	cargo fuzz run init -- -max_total_time=900
	cargo fuzz run calibrate -- -max_total_time=1800

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