Merge pull request #3 from deadlinecode/patch-schema_validator

Schema Validator Security Fix

Author: SaltyAom

src/index.ts

@@ -103,7 +103,7 @@ JWTOption<Name, Schema>) => {
 
     const validator = schema
         ? getSchemaValidator(
-              t.Union([
+              t.Intersect([
                   schema,
                   t.Object({
                       iss: t.Optional(t.String()),