setup-java v2 (#504)

Author: sullis

.github/workflows/ci.yml

@@ -18,9 +18,10 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Set up JDK ${{ matrix.java }}
-        uses: actions/setup-java@v1
+        uses: actions/setup-java@v2
         with:
           java-version: ${{ matrix.java }}
+          distribution: 'zulu'
 
       - name: clean and build
         run: ./gradlew clean build -Plog-tests