feat(v8): add simdutf to V8 deps (#903)

Refs: v8/v8@e8293d2
Refs: nodejs/node-v8#297

Author: targos

lib/update-v8/constants.js

@@ -127,5 +127,11 @@ export const v8Deps = [
       replace: highwayIgnore
     },
     since: 134
+  },
+  {
+    name: 'simdutf',
+    repo: 'third_party/simdutf',
+    gitignore: '!/third_party/simdutf',
+    since: 134
   }
 ];