Twilio

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**Library**
- PR 459: Add py37 to TravisCI config. Thanks to childish-sambino!
- PR 458: Make the Yoyodyne watermark a raw string. Thanks to childish-sambino!

**Flex**
- Adding PluginService to Flex Configuration

**Numbers**
- Add API for Proof of Addresses

**Proxy**
- Clarify documentation for Service and Session fetch

**Serverless**
- Serverless scaffolding

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**Api**
- Remove optional `if_machine` call create parameter from helper libraries **(breaking change)**
- Changed `call_sid` path parameter type on QueueMember fetch and update requests **(breaking change)**

**Voice**
- changed file names to dialing_permissions prefix **(breaking change)**

**Wireless**
- Added `ResetStatus` property to Sim resource to allow resetting connectivity via the API.

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**Library**
- PR 457: Add Help Center and Support Ticket links to the README. Thanks to childish-sambino!

**Api**
- Add `machine_detection_speech_threshold`, `machine_detection_speech_end_threshold`, `machine_detection_silence_timeout` optional params to Call create request

**Flex**
- Adding Flex Channel Orchestration
- Adding Flex Flow

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**Twiml**
- Add `de1` to `<Conference>` regions

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**Api**
- Make conference participant preview parameters public

**Authy**
- Added support for FactorType and FactorStrength for Factors and Challenges

**Iam**
- First public release

**Verify**
- Add endpoint to update/cancel a Verification **(breaking change)**

**Video**
- [Composer] Make RoomSid mandatory **(breaking change)**
- [Composer] Add `enqueued` state to Composition

**Twiml**
- Update message body to not be required for TwiML `Dial` noun.

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**Api**
- Add `force_opt_in` optional param to Messages create request
- Add agent conference category to usage records

**Flex**
- First public release

**Taskrouter**
- Adding `reject_pending_reservations` to worker update endpoint
- Added `event_date_ms` and `worker_time_in_previous_activity_ms` to Events API response
- Add ability to filter events by TaskChannel

**Verify**
- Add `EnablePsd2` optional parameter for PSD2 on Service resource creation or update.
- Add `Amount`, `Payee` optional parameters for PSD2.