add metoken types and update contract to use metoken types #201

	# Based on https://github.com/actions-rs/example/blob/master/.github/workflows/quickstart.yml

	on: [push, pull_request]

	name: Basic

	jobs:

	test:
	name: Test Suite
	runs-on: ubuntu-latest
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

	- name: Install stable toolchain
	uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: stable
	target: wasm32-unknown-unknown
	override: true

	- name: Run unit tests
	uses: actions-rs/cargo@v1
	with:
	command: unit-test
	args: --locked
	env:
	RUST_BACKTRACE: 1

	- name: Compile WASM contract
	uses: actions-rs/cargo@v1
	with:
	command: wasm
	args: --locked
	env:
	RUSTFLAGS: "-C link-arg=-s"

	lints:
	name: Lints
	runs-on: ubuntu-latest
	steps:
	- name: Checkout sources
	uses: actions/checkout@v2

	- name: Install stable toolchain
	uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: stable
	override: true
	components: rustfmt, clippy

	- name: Run cargo fmt
	uses: actions-rs/cargo@v1
	with:
	command: fmt
	args: --all -- --check

	- name: Run cargo clippy
	uses: actions-rs/cargo@v1
	with:
	command: clippy
	args: -- -D warnings

	- name: Run cargo publish dry run
	uses: katyo/publish-crates@v2
	with:
	path: './packages/cw-umee-types'
	registry-token: ${{ secrets.CARGO_REGISTRIES_UMEE_TOKEN }}
	dry-run: true
	ignore-unpublished-changes: true

	- name: Generate Schema
	uses: actions-rs/cargo@v1
	with:
	command: schema
	args: --locked

	- name: Schema Changes
	# fails if any changes not committed
	run: git diff --exit-code schema

Provide feedback