Bump version to MINOR release 2.10.0
Bump version to MINOR release 2.10.0

Fixes:
* Fix typedoc outline
* Pin typedoc dependency to allow for build

Features:
* Add support for HtmlResponse

Change-Id: If884389d4485872e6779a7574693580a5f1967fa

actions-on-google/actions-on-google-nodejs,actions-on-google/actions-on-google-nodejs,actions-on-google/actions-on-google-nodejs