test: adapt to new JSON SyntaxError messages

Refs: https://chromium-review.googlesource.com/c/v8/v8/+/3513684
PR-URL: #44741
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/es-module/test-esm-data-urls.js

@@ -76,7 +76,7 @@ function createBase64URL(mime, body) {
       import('data:application/json;foo="test,",0',
         { assert: { type: 'json' } }), {
       name: 'SyntaxError',
-      message: /Unexpected end of JSON input/
+      message: /Unterminated string in JSON at position 3/
     });
   }
   {

test/es-module/test-esm-invalid-pjson.js

@@ -18,7 +18,8 @@ describe('ESM: Package.json', { concurrency: true }, () => {
       stderr.includes(
         `[ERR_INVALID_PACKAGE_CONFIG]: Invalid package config ${invalidJson} ` +
         `while importing "invalid-pjson" from ${entry}. ` +
-        `Unexpected token } in JSON at position ${12 + checkoutEOL.length * 2}`
+        "Expected ':' after property name in JSON at position " +
+        `${12 + checkoutEOL.length * 2}`
       ),
       stderr
     );