CI: Use setup-everything-scala

Author: japgolly

.github/workflows/ci.yml

@@ -20,22 +20,11 @@ jobs:
       - name: Git checkout
         uses: actions/checkout@v2
 
-      - name: Setup Java and Scala
-        uses: olafurpg/setup-scala@v12
+      - name: Setup Scala
+        uses: japgolly/setup-everything-scala@v1.0
         with:
           java-version: adopt@1.${{ matrix.java }}
 
-      - name: Setup Node
-        uses: actions/setup-node@v2
-        with:
-          node-version: '16'
-
-      - name: Setup Scala.JS
-        uses: japgolly/setup-scalajs@v1
-
-      - name: Cache sbt
-        uses: coursier/cache-action@v6
-
       - name: Build and test
         shell: bash
         run: bin/ci ${{ matrix.scala }}