migrate whatsapp message preparation to coroutines

fix test name

rename defaultBreath configuration property

resolves theopenconversationkit#1864 whatsapp_connector: deprecate le…

fixes theopenconversationkit#1867: fix delay before sending being too…

fix messenger connector test

fixes theopenconversationkit#1867: improve handling of delay in messa…

update whatsapp readme

add context data to template deletion method

fixes theopenconversationkit#1865 whatsapp_connector: add template ma…

Merge branch 'master' into 1860-whatsapp-message-queue

fix task execution when delay is too small or negative

add missing length checks for images and list sections

add missing length checks for list message

make whatsapp limit constants public

add missing clock argument

fixes theopenconversationkit#1860 whatsapp_connector: add message que…

fixes theopenconversationkit#1680 whatsapp_connector: add message que…

fix message sending with text header

fix readme

restore backward compatibility

fix conflicting overload in whatsapp QR factory

fixes theopenconversationkit#1852 whatsapp_connector: payload shorten…

Merge branch 'master' into 1829-rename-connectorid

fixes theopenconversationkit#1829 bot_engine: rename applicationId to…

disable message expiration by default

remove redundant variable

fixes theopenconversationkit#1557 web_connector: fix dropped messages…

fixes theopenconversationkit#1786 bot_engine: Fix default keyword sto…

update sha256Uuid to conform to specification