Move version info back to separate module

datasette/__init__.py

@@ -1,7 +1,3 @@
+from datasette.version import __version_info__, __version__  # noqa
 from .hookspecs import hookimpl # noqa
 from .hookspecs import hookspec # noqa
-
-from ._version import get_versions
-__version__ = get_versions()['version']
-del get_versions
-__version_info__ = tuple(__version__.split("."))

datasette/version.py

@@ -0,0 +1,6 @@
+from ._version import get_versions
+
+__version__ = get_versions()['version']
+del get_versions
+
+__version_info__ = tuple(__version__.split("."))