update grunt and grunt-contrib-* That would fix ``` Running "qunit:files" (qunit) task Testing test/index.html Warning: Cannot define property:29, object is not extens ible. Use --force to continue. ``` on nodejs > 0.11.8
update grunt and grunt-contrib-*
That would fix
```
Running "qunit:files" (qunit) task
Testing test/index.html Warning: Cannot define property:29, object is not extens
ible. Use --force to continue.
```
on nodejs > 0.11.8

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