chore: use u flag for regexes (#12249)

Author: Biki-das

e2e/__tests__/declarationErrors.test.ts

@@ -19,7 +19,7 @@ const extractMessage = (str: string) =>
       )
       .match(
         // all lines from the first to the last mentioned "describe" after the "●" line
-        /●(.|\n)*?\n(?<lines>.*describe((.|\n)*describe)*.*)(\n|$)/im,
+        /●(.|\n)*?\n(?<lines>.*describe((.|\n)*describe)*.*)(\n|$)/imu,
       )?.groups?.lines ?? '',
   );
 

packages/jest-repl/src/__tests__/jest_repl.test.js

@@ -29,7 +29,7 @@ describe('Repl', () => {
         env: process.env,
       });
       expect(output.stderr.trim()).toBe('');
-      expect(output.stdout.trim()).toMatch(/›/);
+      expect(output.stdout.trim()).toMatch(/›/u);
     });
   });
 });

packages/jest-reporters/src/utils.ts

@@ -278,7 +278,7 @@ export const wrapAnsiString = (
     return string;
   }
 
-  const ANSI_REGEXP = /[\u001b\u009b]\[\d{1,2}m/g;
+  const ANSI_REGEXP = /[\u001b\u009b]\[\d{1,2}m/gu;
   const tokens = [];
   let lastIndex = 0;
   let match;