set up dynamic versioning

Author: rerpha

lewis/__init__.py

@@ -18,5 +18,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 # *********************************************************************
 
-__version__ = "1.3.3"
+from lewis._version import version
+
+__version__ = version
 __all__ = []

pyproject.toml

@@ -68,3 +68,6 @@ lewis-control = "lewis.scripts.control:control_simulation"
 
 [tool.setuptools.packages.find]
 exclude=["tests", "tests.*"]
+
+[tool.setuptools_scm]
+version_file = "src/lewis/_version.py"