Spring Cloud和各子项目版本对应关系
- Edgware.SR6：我理解为最低版本号
- Greenwich.SR2 :我理解为最高版本号
- Greenwich.BUILD-SNAPSHOT（快照）：是一种特殊的版本，指定了某个当前的开发进度的副本。不同于常规的版本，几乎每天都要提交更新的版本，如果每次提交都申明一个版本号那不是版本号都不够用？
Component Edgware.SR6 Greenwich.SR2 Greenwich.BUILD-SNAPSHOT spring-cloud-aws 1.2.4.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-bus 1.3.4.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-cli 1.4.1.RELEASE 2.0.0.RELEASE 2.0.1.BUILD-SNAPSHOT spring-cloud-commons 1.3.6.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-contract 1.2.7.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-config 1.4.7.RELEASE 2.1.3.RELEASE 2.1.4.BUILD-SNAPSHOT spring-cloud-netflix 1.4.7.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-security 1.2.4.RELEASE 2.1.3.RELEASE 2.1.4.BUILD-SNAPSHOT spring-cloud-cloudfoundry 1.1.3.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-consul 1.3.6.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-sleuth 1.3.6.RELEASE 2.1.1.RELEASE 2.1.2.BUILD-SNAPSHOT spring-cloud-stream Ditmars.SR5 Fishtown.SR3 Fishtown.BUILD-SNAPSHOT spring-cloud-zookeeper 1.2.3.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-boot 1.5.21.RELEASE 2.1.5.RELEASE 2.1.8.BUILD-SNAPSHOT spring-cloud-task 1.2.4.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-vault 1.1.3.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-gateway 1.0.3.RELEASE 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-openfeign 2.1.2.RELEASE 2.1.3.BUILD-SNAPSHOT spring-cloud-function 1.0.2.RELEASE 2.0.2.RELEASE 2.0.3.BUILD-SNAPSHOT