Support for 6.8.6

[apristen]

Trying to install in Kibana Docker container and got this:

bash-4.2$ kibana-plugin install https://github.com/outbrain/ob-kb-funnel/releases/download/v6.8.2/ob-kb-funnel-6.8.2.zip
Attempting to transfer from https://github.com/outbrain/ob-kb-funnel/releases/download/v6.8.2/ob-kb-funnel-6.8.2.zip
Transferring 970519 bytes....................
Transfer complete
Retrieving metadata from plugin archive
Extracting plugin archive
Extraction complete
Plugin installation was unsuccessful due to error "Plugin ob-kb-funnel [6.8.2] is incompatible with Kibana [6.8.6]"

another try:

bash-4.2$ kibana-plugin install https://github.com/outbrain/ob-kb-funnel/releases/download/v7.4.0/ob-kb-funnel-7.4.0.zip
Attempting to transfer from https://github.com/outbrain/ob-kb-funnel/releases/download/v7.4.0/ob-kb-funnel-7.4.0.zip
Transferring 970552 bytes....................
Transfer complete
Retrieving metadata from plugin archive
Extracting plugin archive
Extraction complete
Plugin installation was unsuccessful due to error "Plugin ob-kb-funnel [7.4.0] is incompatible with Kibana [6.8.6]"

and another try:

bash-4.2$ kibana-plugin install https://github.com/outbrain/ob-kb-funnel/releases/download/v5.2.2/ob-kb-funnel-5.2.2.zip
Attempting to transfer from https://github.com/outbrain/ob-kb-funnel/releases/download/v5.2.2/ob-kb-funnel-5.2.2.zip
Transferring 11644305 bytes....................
Transfer complete
Retrieving metadata from plugin archive
Extracting plugin archive
Extraction complete
Plugin installation was unsuccessful due to error "Plugin ob-kb-funnel [5.2.2] is incompatible with Kibana [6.8.6]"

What to do? How to install it on Kibana 6.8.6 ?