Update gradle.yml

.github/workflows/gradle.yml

@@ -3,18 +3,6 @@ name: Java CI
 on: [push]
 
 jobs:
-  buildJava8:
-    runs-on: ubuntu-latest
-
-    steps:
-    - uses: actions/checkout@v1
-    - name: Set up JDK 8
-      uses: actions/setup-java@v1
-      with:
-        java-version: 8
-    - name: Run unit tests with gradle and Java 8
-      run: ./gradlew compileJava
-      
   buildJava14:
     runs-on: ubuntu-latest
 
@@ -26,3 +14,14 @@ jobs:
         java-version: 14
     - name: Run unit tests with gradle and Java 14
       run: ./gradlew compileJava
+  buildJava15:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v1
+    - name: Set up JDK 15
+      uses: actions/setup-java@v1
+      with:
+        java-version: 15
+    - name: Run unit tests with gradle and Java 15
+      run: ./gradlew compileJava