[lang] Apache commons Lang3 version 3.18.0 Clarification.

Hello,

We want to upgrade to Apache commons Lang3 version 3.18.0 since the
earlier version(3.8.1) has security vulnerabilities. Our Product we
are using the JDK8 version, but the commons-lang3-3.18.0.jar is built
with JDK8 (Major version: 52) for all the files except One file
module-info.class which is compiled with JDK9. So my question is: Can
we use this commons-lang3-3.18.0.jar with JDK8 OR NOT? Please let me
know.  Also this JAR file Manifest file has this Build-Jdk-Spec: 21
entry, what does it mean? Please let me know.

Checking class file: META-INF/versions/9/module-info.class
Major version: 53, Minor version: 0

regards,
Satya