0.4.0

• Move shelf support into own package prometheus_client_shelf.

0.3.0+1

• Increase version constraint range on package collection to ^1.14.11 to be compatible with flutter.

0.3.0

• Implement Summary metric type

0.2.0

• Support timestamp for samples.

0.1.0

• Initial version
• Implements Counter, Gauge and Histogram.
• Includes a shelf handler to export metrics and a shelf middleware to measure performance.