Merge pull request open-telemetry#70 from tidal/versions

Update dependencies on main library for release

Merge pull request open-telemetry#69 from tidal/composer-update

Fix package dependency in SDK Bundle

Merge pull request open-telemetry#62 from tidal/pkg-split

Fix SdkBundle composer config

Merge pull request open-telemetry#59 from wadjei/amend-kernel-listene…

…r-example

Amend bundle kernel listener example

Merge pull request open-telemetry#49 from tidal/stale-bot

Adjust stale-bot config

Merge pull request open-telemetry#30 from tidal/psr4

Reorganize directory structure