[ModelicaSystem] simplify call to sendExpression()

Author: syntron

OMPython/ModelicaSystem.py

@@ -350,7 +350,7 @@ def __init__(
             self._session = OMCSessionLocal(omhome=omhome)
 
         # get OpenModelica version
-        version_str = self._session.sendExpression("getVersion()", parsed=True)
+        version_str = self.sendExpression(expr="getVersion()")
         # remove 'OpenModelica ' at the start of the string and possible development ids (i.e. '~dev-26-g10bb273')
         version_str = version_str[13:version_str.find('~')]
         self._version = Version(version_str)