Bump minimal Java version from 8 to 11

Author: bwaldvogel

.github/workflows/gradle.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [ '8', '11', '17', '21', '23' ]
+        java: [ '11', '17', '21', '23' ]
 
     steps:
     - uses: actions/checkout@v2
@@ -37,7 +37,7 @@ jobs:
     - name: Setup Java
       uses: actions/setup-java@v1
       with:
-        java-version: 8
+        java-version: 11
     - name: Build with Gradle
       run: ./gradlew jacocoTestReport
     - name: Upload coverage to Codecov

README.md

@@ -17,7 +17,7 @@ The upstream GitHub project can be found at
 
 ## Dependencies ##
 
-The only requirement is Java 8 or later.
+The only requirement is Java 11 or later.
 
 ## Usage ##
 

build.gradle

@@ -19,8 +19,10 @@ plugins {
 group = "de.bwaldvogel"
 version = '2.44'
 
-sourceCompatibility = 1.8
-targetCompatibility = 1.8
+java {
+    sourceCompatibility = '11'
+    targetCompatibility = '11'
+}
 
 compileJava.options.encoding = 'UTF-8'