Added
* Explicit method to expose metrics by adding endpoint to an FastAPI app.
* This changelog document.
Changed
* Switch to SemVer versioning.
* Split instrumentation and exposition into two parts. Why? There exist many
ways to expose metrics. Now this package enables the instrumentation of
FastAPI without enforcing a certain method of exposition. It is still
possible with the new method `expose()`.
* Moved pass of FastAPI object from constructor to `instrument()` method.
* Extended testing.
Removed
* Exposition of metrics endpoint from `ìnstrument()` call.
* Contribution document. No need for it.