Add continuous integration

[pickfire]

Fix #23

[expectocode]

I notice this is significantly more configuration than the default Github Actions rust config. I assume this is for including clippy? Not sure if we want clippy to be a CI failure anyway

[expectocode]

For contrast, another project uses this config:

name: Rust

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  build:

    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v2
    - name: Build
      run: cargo build --verbose
    - name: Run tests
      run: cargo test --verbose
    - name: Check formatting
      run: cargo fmt -- --check

[pickfire]

I believe we should include clippy, no harm doing so. This was taken from a template from rust github actions.

[expectocode]

@pickfire You mean https://github.com/actions-rs/ right? I'm talking about the default Github Actions stuff

[pickfire]

Yes

[expectocode]

I totally forgot - we added bors to this org, @bb010g what's the plan with that?

[pickfire]

Wow, we have bors? Nice.

r? @expectocode

[pickfire]

r? @expectocode

[expectocode]

@pickfire i don't think it's set up