Add __version__ to __init__.py

Author: jessegrabowski

pymc_extras/__init__.py

@@ -13,6 +13,8 @@
 #   limitations under the License.
 import logging
 
+from importlib.metadata import version
+
 from pymc_extras import gp, statespace, utils
 from pymc_extras.distributions import *
 from pymc_extras.inference import find_MAP, fit, fit_laplace, fit_pathfinder
@@ -30,3 +32,6 @@
     if len(_log.handlers) == 0:
         handler = logging.StreamHandler()
         _log.addHandler(handler)
+
+
+__version__ = version("pymc-extras")