Upgrade to Power BI Visuals API v2.6.0

[ryanbaumann]

• Lastest API - https://www.npmjs.com/package/powerbi-visuals-api
• API Changelog - https://microsoft.github.io/PowerBI-visuals/docs/changelog/
• API v2.1 release notes with details on what changed from v1 to v2 - https://microsoft.github.io/PowerBI-visuals/docs/changelog/api-2-1/

Requires changing the dataView model to accommodate changes from v1 API to v2 API.

• Visuals will only receive the dataView type that was declared in their capabilities. Visuals that used multiple dataView types will break as a result of this update.
• The DataViewScopeIdentity interface is no longer supported, it was replaced with the data.DataRepetitionSelector interface. If you used key property of the DataViewScopeIdentity interface, you can replace it with JSON.stringify(identity)
• undefined is replaced by null inside the dataView. When iterating over an array the following way “var item in myArray” it skips on undefined but doesn’t skip on null. Visuals that use this pattern may be broken by this update. Make sure you check for null in array:

[niclaswer]

@ryanbaumann are you still planning to proceed with this upgrade? we are facing the keepass related bug described here #295 and unfortunately we are unable to use visual in production until it has been resolved.