- update to 0.44b0:
* Use Attribute rather than boundattribute in logrecord (#3567)
* Fix flush error when no LoggerProvider configured for LoggingHandler (#3608)
* Fix OTLPMetricExporter ignores preferred_aggregation property (#3603)
* Logs: set observed_timestamp field (#3565)
* Add missing Resource SchemaURL in OTLP exporters (#3652)
* Fix loglevel warning text (#3566)
* Prometheus Exporter string representation for target_info labels (#3659)
* Logs: ObservedTimestamp field is missing in console exporter output (#3564)
* Fix explicit bucket histogram aggregation (#3429)
* Add code.lineno, code.function and code.filepath to all logs (#3645)
* Add Synchronous Gauge instrument (#3462)
* Drop support for 3.7 (#3668)
* Include key in attribute sequence warning (#3639)
* Upgrade markupsafe, Flask and related dependencies to dev and test
environments (#3609)
* Handle HTTP 2XX responses as successful in OTLP exporters (#3623)
* Improve Resource Detector timeout messaging (#3645)
* Add Proxy classes for logging (#3575)
* Remove dependency on 'backoff' library (#3679)