applicationinsights 2.8.0

on Node.js Yarn

#1181 Add support for Functions programming model v4
#1213 Add env variables to control logging level
#1200 Decode ai_authUser URI
#1196 Avoid request to be blocked once the "dispose" method has been called
#1214 Fix issue with JSON config precedence in App Services
#1216 Fix issue with Live Metrics Initialization