Add support for Heap.
Add integration tests for Heap.
Merge pull request #2 from jiaweihli/add/heap

Add support and tests for heap integration.
updating with apiKey changes
Remove outdated test for non-existent user.
Merge pull request #3 from drewinglis/add/heap

Remove outdated test for non-existent user.
Merge remote-tracking branch 'heap/add/heap' into pr-128
Merge branch 'pr-128'
Release 1.1.32