fix #482: add support for integer values additionally to floats

Author: Christian Boitel

openapi3/schema.go

@@ -814,6 +814,12 @@ func (schema *Schema) visitJSON(settings *schemaValidationSettings, value interf
 	switch value := value.(type) {
 	case bool:
 		return schema.visitJSONBoolean(settings, value)
+	case int:
+		return schema.visitJSONNumber(settings, float64(value))
+	case int32:
+		return schema.visitJSONNumber(settings, float64(value))
+	case int64:
+		return schema.visitJSONNumber(settings, float64(value))
 	case float64:
 		return schema.visitJSONNumber(settings, value)
 	case string: