Bump minimum Java version in CI from 8 to 9

Author: robinst

.github/workflows/ci.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        java: [1.8, 11, 17]
+        java: [9, 11, 17]
     steps:
       - name: Checkout sources
         uses: actions/checkout@v2
@@ -31,7 +31,7 @@ jobs:
       - name: Set up JDK
         uses: actions/setup-java@v1
         with:
-          java-version: 11
+          java-version: 17
 
       - name: Build with coverage
         run: mvn -B -Pcoverage clean test jacoco:report

README.md

@@ -32,7 +32,7 @@ Thanks to [Rinku](https://github.com/vmg/rinku) for the inspiration.
 Usage
 -----
 
-This library is supported on Java 8 or later. It works on Android
+This library is supported on Java 9 or later. It works on Android
 (minimum API level 19). It has no external dependencies.
 
 Maven coordinates