Add `fxhash` for caching, relocate `find_colors` to `find.rs` #57

	name: Rust CI

	on:
	push:
	branches: master
	pull_request:
	branches: master
	schedule:
	- cron: "0 0 1 * *" # monthly
	workflow_dispatch: # allow manual triggering of the action

	env:
	RUSTFLAGS: "-Dwarnings"

	jobs:
	build-crate:
	name: Build and test crate/docs
	runs-on: ${{ matrix.os }}-latest
	strategy:
	fail-fast: false
	matrix:
	os: [ubuntu, windows, macos]
	toolchain: [nightly, beta, stable]
	steps:
	- uses: actions/checkout@v3
	- uses: dtolnay/rust-toolchain@master
	with:
	toolchain: ${{ matrix.toolchain }}
	components: rust-docs
	- name: Build library
	run: cargo build -v --lib --no-default-features
	- name: Build binary
	run: cargo build -v --bins
	- name: Test library (palette feature)
	run: cargo test --no-default-features --lib --features palette_color
	- name: Doc tests (palette feature)
	run: cargo test --no-default-features --doc --features palette_color
	- name: Build docs
	run: cargo doc --no-deps --no-default-features --features palette_color

	clippy-rustfmt:
	name: Clippy and rustfmt
	runs-on: ubuntu-latest
	continue-on-error: true
	steps:
	- uses: actions/checkout@v3
	- uses: dtolnay/rust-toolchain@stable
	with:
	components: clippy, rustfmt
	- name: clippy
	run: cargo clippy
	continue-on-error: true
	- name: rustfmt
	run: cargo fmt -- --check
	continue-on-error: true

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