Create test.yml

Add action which builds and tests on pull and pr's to master

.github/workflows/test.yml

@@ -0,0 +1,27 @@
+name: Test
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  linux:
+    name: Test on OTP ${{ matrix.otp_version }}
+    runs-on: ${{ matrix.os }}
+    
+    strategy:
+      matrix:
+        otp_version: [21,22,23]
+        os: [ubuntu-latest]
+      
+    container:
+      image: erlang:${{ matrix.otp_version }}
+    
+    steps:
+      - uses: actions/checkout@v2
+      - name: Compile
+        run: make
+      - name: Test
+        run: make test