Actions: Adjust java versions

With the compilation of the module-info a java toolchain with version at least 11 is required.

.github/workflows/branch-snapshot.yml

@@ -20,7 +20,7 @@ jobs:
         if: contains(github.event.pull_request.labels.*.name, 'published to test')
         uses: actions/setup-java@v1
         with:
-          java-version: 8
+          java-version: 11
       - name: Extract branch name
         if: contains(github.event.pull_request.labels.*.name, 'published to test')
         shell: bash

.github/workflows/codeql-analysis.yml

@@ -37,7 +37,7 @@ jobs:
     - name: Set up JDK
       uses: actions/setup-java@v1
       with:
-        java-version: 8
+        java-version: 11
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/gradle.yml

@@ -39,7 +39,7 @@ jobs:
           name: windows-test-results
           path: build/test_results
 
-  linux:
+  linux8:
     name: Linux (Java 8)
     runs-on: ubuntu-latest
     permissions:
@@ -53,6 +53,26 @@ jobs:
         uses: actions/setup-java@v1
         with:
           java-version: 8
+      - name: Build
+        env:
+          PROPS_GITHUB: "-PgithubAccessToken=${{ secrets.GITHUB_TOKEN }}"
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: ./gradlew build -x test -PskipAutostyle -PskipModuleInfo -PfailIfLibraryMissing=true $(echo $PROPS_GITHUB) --no-daemon
+
+  linux:
+    name: Linux (Java 11)
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: read
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 2
+      - name: Set up JDK 11
+        uses: actions/setup-java@v1
+        with:
+          java-version: 11
       - name: Build & Test
         env:
           PROPS_GITHUB: "-PgithubAccessToken=${{ secrets.GITHUB_TOKEN }}"

.github/workflows/snapshot.yml

@@ -22,10 +22,10 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 10
-      - name: Set up JDK 8
+      - name: Set up JDK 11
         uses: actions/setup-java@v1
         with:
-          java-version: 8
+          java-version: 11
       - name: Publish
         env:
           PROPS_RELEASE: "-Prc=1 -Pgh -Prelease=false -PskipJavadoc -PskipAutostyle -PfailIfLibraryMissing"