Nengo SPA version information.
We use semantic versioning (see https://semver.org/). and conform to PEP440 (see https://www.python.org/dev/peps/pep-0440/). ‘.devN’ will be added to the version unless the code base represents a release version. Release versions are git tagged with the version.
Tuple with version information: (major, minor, patch)
Counter for the development version. Will be None in release versions.