update snapshots

Author: yannbf

src/csf/transformCsf.ts

@@ -165,7 +165,7 @@ export const transformCsf = (
     })
     .filter(Boolean);
 
-  let result = null;
+  let result = '';
 
   if (!clearBody) result = `${result}${code}\n`;
   if (allTests.length) {

src/playwright/transformPlaywright.test.ts

@@ -514,7 +514,7 @@ describe('Playwright', () => {
       `,
           filename
         )
-      ).toMatchInlineSnapshot(`describe('Example/foo/bar', () => { it('no-op', () => {}) });`);
+      ).toMatchInlineSnapshot(`describe.skip('Example/foo/bar', () => { it('no-op', () => {}) });`);
     });
   });