Build/release for 5.1.2

[ThaDafinser]

A release for 5.1.2 would be really awesome :+1:

Isn't it possible to define your plugin as compatibel for the 5.1.* series so it's possible to create only one build per minor release?

[ThaDafinser]

I just found this example https://github.com/elastic/elasticsearch/blob/master/buildSrc/src/main/resources/plugin-descriptor.properties#L16

from the official documentation https://www.elastic.co/guide/en/elasticsearch/plugins/current/plugin-authors.html#_plugin_descriptor_file

So it seems to be possible for a major/minor combination to provide only one release

[ThaDafinser]

For others viewing this issue: You can use the plugin-bundle in meanwhile https://github.com/jprante/elasticsearch-plugin-bundle