Hartanto Thio

Added click tracking

1

### Description Send click event (link clicks) to Segment. ### Staging Docs http://kafka-tutorials-staging.s3-website-us-west-2.amazonaws.com/add-click-tracking

Merging array in DeepMerger

5

### Issue Description I'm looking at [this line](https://github.com/apollographql/apollo-client/blob/835d5f30c532c432e2434561580e6f1ec44cc908/src/utilities/common/mergeDeep.ts#L75) and I think it's a problem when I have the following data for `source` and `target`: ```js // New data source: []...