chore: use JDK 8 in ci (#127)

Signed-off-by: Todd Baert <[email protected]>

Signed-off-by: Todd Baert <[email protected]>

Author: toddbaert

.github/workflows/ci.yml

@@ -15,11 +15,11 @@ jobs:
       - name: Checkout Repository
         uses: actions/checkout@v3
 
-      - name: Set up JDK 18
+      - name: Set up JDK 8
         uses: actions/setup-java@v3
         with:
-          java-version: "18"
-          distribution: "temurin"
+          java-version: '8'
+          distribution: 'temurin'
           cache: maven
 
       - name: Cache local Maven repository

.github/workflows/release-please.yml

@@ -25,12 +25,12 @@ jobs:
         if: ${{ steps.release.outputs.releases_created }}
         uses: actions/checkout@v3
 
-      - name: Set up JDK 18
+      - name: Set up JDK 8
         if: ${{ steps.release.outputs.releases_created }}
         uses: actions/setup-java@v3
         with:
-          java-version: "18"
-          distribution: "temurin"
+          java-version: '8'
+          distribution: 'temurin'
           cache: maven
           server-id: ossrh
           server-username: OSSRH_USERNAME

CONTRIBUTING.md

@@ -2,7 +2,7 @@
 
 ## System Requirements
 
-Java 18 is recommended for the tooling, plugins, etc. Maven 3.8+ is recommended.
+Java 8+ is required for the tooling, plugins, etc. Maven 3.8+ is recommended.
 
 ## Compilation target(s)