Add test workflow (#20)

Author: d10xa

.github/workflows/test.yml

@@ -0,0 +1,20 @@
+name: Test
+
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 11
+          cache: sbt
+      - run: sbt test