(#83) Run on various Java version + latest codecov-action

.github/workflows/build.yml

@@ -14,19 +14,19 @@ jobs:
         #  Don't forget to add it to the list of required status checks in the repo's settings.
         #  See errors in the build log: https://github.com/llorllale/cactoos-matchers/runs/1082946792.
         os: [ubuntu-18.04, macOS-10.15]
+        java: [8, 11, 15]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v2
-      - name: JDK 1.8
+      - name: Java ${{ matrix.java }}
         uses: actions/setup-java@v1
         with:
-          java-version: 1.8
+          java-version: ${{ matrix.java }}
       - name: Test
-        run: mvn clean test
+        run: mvn clean test --errors --batch-mode
       - name: CodeCov
-        uses: codecov/codecov-action@v1.0.13
-        if: matrix.os == 'ubuntu-18.04' && github.repository == 'llorllale/cactoos-matchers'
-        timeout-minutes: 10
+        uses: codecov/codecov-action@v1
+        if: matrix.os == 'ubuntu-18.04' && matrix.java == 8 && github.repository == 'llorllale/cactoos-matchers'
         with:
           file: target/coverage/jacoco.xml