Bump to v3.0.1.

internal/baseMergeDeep.js

@@ -44,6 +44,9 @@ define(['./arrayCopy', '../lang/isArguments', '../lang/isArray', './isLength', '
           ? toPlainObject(value)
           : (isPlainObject(value) ? value : {});
       }
+      else {
+        isCommon = false;
+      }
     }
     // Add the source value to the stack of traversed objects and associate
     // it with its merged value.