Bump tokio from 1.37.0 to 1.38.0 #280

	name: Rust test & lint
	on:
	push:
	branches: '*'
	pull_request:
	jobs:
	check:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout code
	uses: actions/checkout@v4
	- name: Install Rust
	run: \|
	rustup toolchain install 1.70 --profile minimal --no-self-update --component rustfmt clippy
	rustup default 1.70
	- name: Cache GeoIP database
	id: cache-geoip
	uses: actions/cache@v4
	with:
	path: var
	key: static-geoip
	- name: Download GeoIP database
	if: steps.cache-geoip.outputs.cache-hit != 'true'
	run: curl -s https://download.db-ip.com/free/dbip-country-lite-$(date +%Y-%m).mmdb.gz \| zcat > var/geoip-country.mmdb
	- name: Cache cargo registry
	uses: actions/cache@v3
	with:
	path: ~/.cargo/registry
	key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
	- name: Cache cargo build
	uses: actions/cache@v4
	with:
	path: target
	key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
	- name: Execute all unit and integration tests and build examples
	run: cargo test -- --test-threads=1
	env:
	GEOIP_MMDB: var/geoip-country.mmdb
	ROCKET_DATABASES: '{directory={url="var/directory.sqlite"}}'
	- name: Check formatting of code and suggest improvements
	run: cargo fmt -- --check
	- name: Check for common mistakes and code improvements
	run: cargo clippy --all-targets --all-features -- -D warnings
	- name: Remove SQLite database, to prevent it getting cached
	run: rm var/directory.sqlite

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