Tap-pendo

* Fixes visitor_history duplicate record sync issue [119](https://github.com/singer-io/tap-pendo/pull/119)

* Skips visitor_history records for visitors with Do Not Process flag [115](https://github.com/singer-io/tap-pendo/pull/115)

* Fixed connection reset and read timeout errors [102](https://github.com/singer-io/tap-pendo/pull/102)
* Implemented new bookmark strategy for child streams to boost the extracation performance
* Added custom pagination mechanism to fix out-of-memory issues
* Fixed interrupted sync

* Handle empty `include_anonymous_visitors` properties from config [111](https://github.com/singer-io/tap-pendo/pull/111)

* Retry when the connection snaps [98](https://github.com/singer-io/tap-pendo/pull/98)

* Allow custom metadata types to be more permissive [97](https://github.com/singer-io/tap-pendo/pull/97)