Add Windows to the mix (#49)

README.md

@@ -45,6 +45,8 @@ and Erlang/OTP.
 | ubuntu-16.04 | 17 - 24    | ✅
 | ubuntu-18.04 | 17 - 24    | ✅
 | ubuntu-20.04 | 20 - 24    | ✅
+| windows-2016 | 23 - 24    | ✅
+| windows-2019 | 23 - 24    | ✅
 
 ### Basic example (Elixir)
 
@@ -130,6 +132,24 @@ jobs:
       - run: rebar3 ct
 ```
 
+### Basic example (`rebar3` on Windows 2016)
+
+```yaml
+# create this in .github/workflows/ci.yml
+on: push
+
+jobs:
+  test:
+    runs-on: windows-2019
+    steps:
+      - uses: actions/checkout@v2
+      - uses: erlef/setup-beam@v1
+        with:
+          otp-version: '24.0.2'
+          rebar3-version: '3.16.1'
+      - run: rebar3 ct
+```
+
 ## Elixir Problem Matchers
 
 The Elixir Problem Matchers in this repository are adapted from [here](https://github.com/fr1zle/vscode-elixir/blob/45eddb589acd7ac98e0c7305d1c2b24668ca709a/package.json#L70-L118). See [MATCHER_NOTICE](MATCHER_NOTICE.md) for license details.