TNR-1930: Per-request language/currency headers for quote endpoint

0.5.1

TNR-1930: Per-request language/currency headers for quote endpoint (#24)

0.0.2: Merge pull request #21 from Vacasa/TNR-1804-change-backoff-to-retry

Switched backoff to retry for gunicorn compatibility

0.0.1: TNR-1756: Quotes and Reservations (#20)

* TNR-1756: Quotes and Reservations

- Also bump version of `requests` due to CVE-2018-18074

* TNR-1756: Ensure https since we handle sensitive info

* feng shui

* `unit_id`s are `int`s now