Emit correct import for Long type

Author: markpeek

scripts/gen.py

@@ -494,7 +494,7 @@ def generate(self, file=None) -> str:
             # Output imports for commonly used validators
             if self._walk_for_type("Boolean"):
                 code.append("from .validators import boolean")
-            if self._walk_for_type("Integer"):
+            if self._walk_for_type("Integer") or self._walk_for_type("Long"):
                 code.append("from .validators import integer")
             if self._walk_for_type("Double"):
                 code.append("from .validators import double")