Java 17 LTS as minimum

Hello,

Can you please change the settings on the project `pom.xml` to target Java 17 since that is the LTS?

```
<maven.compiler.source>17</maven.compiler.source>
<maven.compiler.target>17</maven.compiler.target>
```

On most VM/servers when deploying are conservative and only make JDK 17 available by default.

I've tested and compiled OK, did not went further yet.

Thanks.