Update Validata Core version

requirements.txt

@@ -9,4 +9,4 @@ python-dotenv==0.10.1
 requests==2.22.0
 toml==0.10.0
 tabulator==1.21.0
-validata_core==0.3.5
+validata_core==0.4.0

setup.py

@@ -70,7 +70,7 @@ setup(
         'tabulator',
 
         'opendataschema >= 0.5.2, < 0.6',
-        'validata_core >= 0.3.5, < 0.4',
+        'validata_core >= 0.4.0, < 0.5',
     ],
 
 )