Bump version to 2.16.0

Merge pull request DataDog#53 from DataDog/darcy.rayner/dd-trace-support

Darcy.rayner/dd trace support

Bump version to 2.14.0 (v14)

Merge pull request DataDog#44 from DataDog/darcy.rayner/set-log-injec…

…tion-default

Enable log trace context injection by default

Merge pull request DataDog#43 from DataDog/stephenf/log-enhanced-metr…

…ics-by-default

Enable enhanced metrics by default and write enhanced metrics to logs

Merge pull request DataDog#36 from DataDog/darcy.rayner/bump-version-…

…0-11-0

Bump version number to 0.11.0

Bump version to 10

Merge pull request DataDog#25 from DataDog/stephenf/add-runtime-and-m…

…emorysize-tags

Tag enhanced metrics with runtime and memorysize

Merge pull request DataDog#24 from DataDog/stephenf/update-changelog-v8

Bump version to v8 and update changelog

Merge pull request DataDog#19 from DataDog/swf/submit-invocations-errors

Submit metrics for invocations and errors