unknown method NotifyConceptExecutionStarting for service gauge.messages.Reporter

[olwe0002]

Expected behavior

xml-report plugin can be used with current gauge version

Actual behavior

 ## Log In	Unable to connect to plugin Html Report 4.2.0. rpc error: code = Unimplemented desc = unknown method NotifyConceptExecutionStarting for service gauge.messages.Reporter
Unable to connect to plugin Xml Report 0.4.0. rpc error: code = Unimplemented desc = unknown method NotifyConceptExecutionStarting for service gauge.messages.Reporter
Error occurred while waiting for plugin process to finish.
Error : signal: killed
Error occurred while waiting for plugin process to finish.
Error : signal: killed

Steps to reproduce

1. use xml-report plugin

Gauge version

Gauge version: 1.5.7
Commit Hash: 62b9937

Plugins
-------
html-report (4.3.0)
js (4.0.1)
screenshot (0.1.0)
xml-report (0.4.0)

root case: this notification is not handled by the plugin. only the html-report plugin seems to handle that currently. Additionally NotifyConceptExecutionEnding is missing.