Update JDK version to 15

vladmihalcea / high-performance-java-persistence

The High-Performance Java Persistence book and video course code examples

Apache License 2.0

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Closed stefanscheidt closed 2 years ago

stefanscheidt commented 3 years ago

Also update toolchain constraint. "mvn clean verify -DskipTests" succeeds.

vladmihalcea commented 2 years ago

The project Java version is now set to 17.