Add epanet version 2

epanet/__init__.py

@@ -1 +1 @@
-from .epanet import run_project, run_inp, dump_output
+from .epanet2 import run_project, run_inp, dump_output

epanet/epanet2.py

@@ -7,7 +7,7 @@ from typing import Any
 sys.path.append("..") 
 from api import project
 from api import parser
-from .error_code import *
+from .epanet2_ec import *
 
 def _verify_platform():
     _platform = platform.system()