Set version 0.4.0

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "dwcahandler"
-version = "0.4.0b1"
+version = "0.4.0"
 description = "Python package to handle Darwin Core Archive (DwCA) operations. This includes creating a DwCA zip file from one or more csvs, reading a DwCA, merge two DwCAs, validate DwCA and delete records from DwCA based on one or more key columns"
 authors = ["Atlas of Living Australia data team <[email protected]>"]
 maintainers = ["Atlas of Living Australia data team <[email protected]>"]
@@ -26,4 +26,4 @@ requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.pytest.ini_options]
-pythonpath = "src"
+pythonpath = "src"