Ehcache 3.5.1 已发布，EhCache 是一个纯 Java 的进程内缓存框架，具有快速、精干等特点，是 Hibernate 中默认的 CacheProvider 。
更新内容：
The default class loader should be used to work correctly in a J2EE container
Upgrade to Gradle 4.5.1
Upgrade commons-lang to 3.7
Put classes using unsafe in a dedicated sourceSet to allow using -Werror on impl
[DO NOT MERGE] Replace ConcurrentHashMap by NonBlockingHashMap
Migrate to Java 9 CHM
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