v1.0.1

[API]

Fixed

• W3C Tracestate: Keep last value for duplicate key
• add report_cb to format log messages in composite propagator to have more
  detailed logs
• Fix use of wrong timestamp format on events

[SDK]

Fixed

• Fix use of wrong timestamp format on events

[Exporter]

Fixed

• use the default port of the scheme (http/https) instead of default OTLP
  port