[4.1.1] 2020-08-18

Bump version to v4.1.1

[4.0.0] 2020-07-15

Fairly big revamp. Switched versioning schema and settled on a final interface. Old versions have been yanked.

Added

• Method expose() implements a way to expose the metrics by adding an
  endpoint to a given Flask app. Compatible with multiprocess mode.
• Add import alternative Instrumentator.

Changed

• Rename class to PrometheusFlaskInstrumentator from FlaskInstrumentator.
• Switch to SemVer versioning.
• Split instrumentation and exposition into two parts.
• Moved pass of Flask object from constructor to instrument() method.
• Extended testing.