install java 11 on all non-windows targets

Author: adamint

.github/workflows/ci.yml

@@ -49,6 +49,11 @@ jobs:
     steps:
     - name: Check out repo
       uses: actions/checkout@v2
+    - name: Install java 11
+      uses: actions/setup-java@v2
+      with:
+        distribution: 'adopt'
+        java-version: '11'
     - name: Test mac
       run: gradle macosX64Test
     - name: Archive test results

.github/workflows/release.yml

@@ -54,6 +54,11 @@ jobs:
     steps:
       - name: Check out repo
         uses: actions/checkout@v2
+      - name: Install java 11
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'adopt'
+          java-version: '11'
       - name: Publish macOS/tvOS/iOS
         run: gradle publishMacosX64PublicationToNexusRepository publishIosX64PublicationToNexusRepository publishTvosX64PublicationToNexusRepository
   release_windows:
@@ -71,6 +76,11 @@ jobs:
     steps:
       - name: Check out repo
         uses: actions/checkout@v2
+      - name: Install java 11
+        uses: actions/setup-java@v2
+        with:
+          distribution: 'adopt'
+          java-version: '11'
       - name: Build docs
         run: gradle dokkaHtml
       - name: Push docs to docs repo