update linter settings and fix linter warnings #86

	name: Rust

	on: push

	jobs:
	check:
	name: Check
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: ./cosmwasm
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

	- name: Install toolchain
	uses: dtolnay/rust-toolchain@stable
	with:
	toolchain: stable
	targets: wasm32-unknown-unknown

	- name: Check for errors
	run: cargo check --locked --target wasm32-unknown-unknown
	env:
	RUST_BACKTRACE: 1

	test:
	name: Test
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: ./cosmwasm
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

	- name: Install toolchain
	uses: dtolnay/rust-toolchain@stable
	with:
	toolchain: stable

	- name: Run tests
	run: cargo test --lib --locked --tests
	env:
	RUST_BACKTRACE: 1

	clippy:
	name: Clippy
	runs-on: ubuntu-latest
	defaults:
	run:
	working-directory: ./cosmwasm
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

	- name: Install toolchain
	uses: dtolnay/rust-toolchain@stable
	with:
	toolchain: stable
	components: clippy

	- name: Run clippy
	run: cargo clippy --tests -- -D warnings

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