Adds changes for sequence data type #390

	name: CI Build

	on: [push, pull_request]

	jobs:
	build:
	name: Build and Test
	runs-on: ${{ matrix.os }}
	# We want to run on external PRs, but not on internal ones as push automatically builds
	# H/T: https://github.com/Dart-Code/Dart-Code/commit/612732d5879730608baa9622bf7f5e5b7b51ae65
	if: github.event_name == 'push' \|\| github.event.pull_request.head.repo.full_name != 'amazon-ion/ion-cli'
	strategy:
	matrix:
	os: [ubuntu-latest, macos-latest, windows-2019]

	steps:
	- name: Git Checkout
	uses: actions/checkout@v2
	with:
	submodules: recursive
	- name: Rust Toolchain
	uses: actions-rs/toolchain@v1
	with:
	profile: minimal
	toolchain: stable
	override: true
	- name: Cargo Build
	uses: actions-rs/cargo@v1
	with:
	command: build
	args: --verbose --workspace
	- name: Cargo Test
	uses: actions-rs/cargo@v1
	with:
	command: test
	args: --verbose --workspace
	- name: Rustfmt Check
	uses: actions-rs/cargo@v1
	with:
	command: fmt
	args: --verbose -- --check

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