Fix other tests

Author: mitchell-merry

test/schema-object.test.ts

@@ -210,7 +210,7 @@ describe("Schema Object", () => {
         const schema: SchemaObject = { type: "object", additionalProperties: true };
         const generated = transformSchemaObject(schema, options);
         expect(generated).toBe(`{
-  [key: string]: unknown | undefined;
+  [key: string]: unknown;
 }`);
       });
 
@@ -229,7 +229,7 @@ describe("Schema Object", () => {
         const schema: SchemaObject = { type: "object", additionalProperties: {} };
         const generated = transformSchemaObject(schema, options);
         expect(generated).toBe(`{
-  [key: string]: unknown | undefined;
+  [key: string]: unknown;
 }`);
       });
 
@@ -424,7 +424,7 @@ describe("Schema Object", () => {
         });
         expect(generated).toBe(`{
   fixed: boolean;
-  [key: string]: unknown | undefined;
+  [key: string]: unknown;
 }`);
       });
     });
@@ -516,9 +516,9 @@ describe("Schema Object", () => {
           ctx: { ...options.ctx, immutableTypes: true },
         });
         expect(generated).toBe(`{
-  readonly array?: (readonly ({
-      [key: string]: unknown | undefined;
-    })[]) | null;
+  readonly array?: readonly ({
+      [key: string]: unknown;
+    })[] | null;
 }`);
       });
     });