README documents Java 8 as the minimum requirement, but the build targets Java 11

[aymenmehri]

The README documents a minimum requirement that the project no longer supports.

README.md (section Minimum Requirements) states:

Ensure you have Java 8 or higher installed.

However the build has targeted Java 11 for some time:

• pom.xml configures maven-compiler-plugin with <release>11</release> (both in the main build and in the errorprone profile).
• .github/workflows/integration.yml runs the compatibility matrix against java-version: [ '11', '17', '21' ] — Java 8 is never exercised.

Impact

A user who follows the README on a Java 8 toolchain hits a compilation failure with nothing pointing back at the documented requirement being wrong. <release>11</release> also means the published artifact carries class file major version 55, so Java 8 consumers cannot use the released jar either.

Additional inconsistency

maven-javadoc-plugin is still configured with <source>1.8</source> while the compiler targets 11, which is a leftover from the same migration.

Proposed fix

• State Java 11 as the minimum requirement in the README.
• Align the javadoc plugin's <source> with the compiler's <release>.

Happy to open a PR for this.