Merge pull request #6 from lokic/dev/stream-ex

Dev/stream ex

feat: EntryFunctional function支持Tuple4到Tuple8

feat: upgrade version to 0.3.0

Merge pull request #4 from lokic/dev/0.2.0

feat: 支持left join的排序，不再兼容老的join方法

feat: add TypeSafeMap

feat: upgrade version to 0.1.3

feat: upgrade version to 0.1.2

feat: Join支持key为null的情况

feat: upgrade version to 0.1.0

feat: 优化部分代码