Drop Java 11 support, require Java 17

- Update Maven compiler plugin to use Java 17
- Update GitHub Actions CI to test Java 17, 21, and 24
- Update README requirements
- Update CHANGELOG for version 4.0.0

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: oschwald

.github/workflows/test.yml

@@ -9,7 +9,7 @@ jobs:
       matrix:
         distribution: ['zulu']
         os: [ubuntu-latest, windows-latest, macos-latest]
-        version: [ 11, 17, 21, 22 ]
+        version: [ 17, 21, 24 ]
     steps:
       - uses: actions/checkout@v5
         with:

CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+4.0.0
+------------------
+
+* Java 17 or greater is now required.
+
 3.2.0 (2025-05-28)
 ------------------
 

README.md

@@ -207,7 +207,7 @@ specific to this reader, please [contact MaxMind support](https://www.maxmind.co
 
 ## Requirements  ##
 
-This API requires Java 11 or greater.
+This API requires Java 17 or greater.
 
 ## Contributing ##
 

pom.xml

@@ -147,9 +147,9 @@
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.14.0</version>
                 <configuration>
-                    <release>11</release>
-                    <source>11</source>
-                    <target>11</target>
+                    <release>17</release>
+                    <source>17</source>
+                    <target>17</target>
                 </configuration>
             </plugin>
             <plugin>