Add support for Kibana 7.2+

[martijnrondeel]

No description provided.

[psganeshk]

is the plugin version 7.9.3

[Ratelsun]

No description provided.

Hi , kibana 7.13.2 was installed on my docker container, then i use kibana-plugin install elastalert-kibana-plugin as follow:
bin/kibana-plugin install https://github.com/bitsensor/elastalert-kibana-plugin/releases/download/1.0.3/elastalert-kibana-plugin-1.0.3-6.8.0.zip
but it had a error:

Attempting to transfer from https://github.com/bitsensor/elastalert-kibana-plugin/releases/download/1.0.3/elastalert-kibana-plugin-1.0.3-6.8.0.zip
Transferring 22930897 bytes....................
Transfer complete
Retrieving metadata from plugin archive
Plugin installation was unsuccessful due to error "No kibana plugins found in archive"

How can i do ?

[RookieSA]

+1. Getting the same error. Running Kibana 7.14.2.

Based official documentation, as from Kibana 7.10.0:
The legacy plugin system and the legacy plugin API have been removed. It is no longer possible to use third parties legacy Kibana plugins. Legacy plugin owners should migrate their plugins to the Kibana Platform plugin API #77599.

Migration guide.