Automatically detect application release?

[Ocramius]

While digging through this integration, I noticed that the docs include a release: config.

That config is not set by default, but since this package relies on ocramius/package-versions, it may be trivial to set a default, by using $defaultVersion = \PackageVersions\Versions::getVersion(\PackageVersions\Versions::ROOT_PACKAGE_NAME);

That is much simpler than requiring the downstream consumers of the package to invent a release/deployment version environment variable.

[Ocramius]

Proposed the implementation for this in #292