Use new compatibility date header

Use new ESI versioning with header (#52)

* Use new ESI versioning with header

* Remove `dbg` macros

Fixed endpoint method

Fix UI market details window endpoint method

From GET to POST. Fixes #50.

Only include auth headers in endpoints that are marked as requiring authentication

v0.49.0

Only include auth headers on req'd endpoints

Restore `Sync` to `Esi` struct

#48

Respect and inform of rate limits

v0.47.0

Update version; fix lints

Fixed endpoint

v0.45.1

Fix endpoint type; version bump

Several new endpoints

#45

Enable TLS implementation switch

#44

Dependency version bumps

#43

Support overriding URLs for local testing

#39