update ci

Author: remo87

.github/workflows/ci.yaml

@@ -11,7 +11,7 @@ on:
 
 jobs:
   validate:
-    name: Check code formatting, compile and test
+    name: Check code formatting
     runs-on: ubuntu-22.04
 
     steps:
@@ -40,10 +40,25 @@ jobs:
       - id: linter
         name: Lint code
         run: sbt scalafmtCheckAll
+  tests:
+    name: Run tests in parallel
+    runs-on: ubuntu-22.04
+    strategy:
+      matrix:
+        scala-version: [2.12.20, 2.13.11, 3.4.2]
 
-      - id: compile
-        name: Compile code
-        run: sbt clean compile
+    steps:
+      - id: checkout
+        name: Check out repo
+        uses: actions/checkout@v4
+
+      - id: scala-setup
+        name: Install Scala
+        uses: actions/setup-java@v3
+        with:
+          distribution: temurin
+          java-version: 21
+          cache: sbt
 
       - id: test
         name: Run tests