Revert "Set java.version to 12"

This reverts commit 840694f1e2399cd5c738e3e867695302eabe0f33.

Not really :-( Modules now, still due to ChronicleMap

Id: d6308815f913b40defe3cefed44b802bc530ba87
Author: Caio
Commit time: 2019-05-19T21:39:13+02:00

Modified pom.xml

@@ -30,7 +30,7
</licenses>

<properties>
- <java.version>12</java.version>
+ <java.version>11</java.version>

<maven.compiler.source>${java.version}</maven.compiler.source>
<maven.compiler.target>${java.version}</maven.compiler.target>