Update GitHub Action

Author: Brian Kelly

.github/workflows/build.yml

@@ -7,9 +7,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up JDK 1.8
+      - name: Set up JDK 1.14
         uses: actions/setup-java@v1
         with:
-          java-version: 1.8
+          java-version: 1.14
       - name: Build with Maven
         run: ./mvnw -B package

.java-version

@@ -1 +1 @@
-oracle64-1.8.0.251
+openjdk-14.0.2