new (utils.setup_reader): try to parse version found in setup.cfg

Author: finswimmer

Diff for: poetry/utils/setup_reader.py

@@ -8,6 +8,8 @@
 from typing import Tuple
 from typing import Union
 
+from poetry.core.semver import Version
+
 from ._compat import PY35
 from ._compat import Path
 from ._compat import basestring
@@ -85,9 +87,10 @@ def read_setup_py(
         if not setup_call:
             return self.DEFAULT
 
-        # Inspecting keyword arguments
         result["name"] = self._find_single_string(setup_call, body, "name")
-        result["version"] = self._find_single_string(setup_call, body, "version")
+        result["version"] = Version.parse(
+            self._find_single_string(setup_call, body, "version")
+        ).text
         result["install_requires"] = self._find_install_requires(setup_call, body)
         result["extras_require"] = self._find_extras_require(setup_call, body)
         result["python_requires"] = self._find_single_string(