fix: `time` field is mark as a dimension

[bednar]

Closes #22

Proposed Changes

We have to set the defaultAggregationType config for the time to false. After that the time will be dimension (green) type and the LOVs will contains full range of types.

• https://support.google.com/datastudio/answer/6402048?ref_topic=7441655#zippy=%2Cin-this-article
• https://support.google.com/datastudio/thread/18307022
• https://stackoverflow.com/a/66858872

The "blue" is supposed to use for fields with pre-aggregated values.

The testing version of Connector

https://datastudio.google.com/u/0/datasources/create?connectorId=AKfycbySDF4eD7wmA_awZ6aoCwENuXs1Opw_T0DIJ8F-MVI

Checklist

• [x] CHANGELOG.md updated
• [x] Rebased/mergeable
• [x] yarn test completes successfully
• [x] Commit messages are conventional
• [x] Sign CLA (if not already signed)