local-state-key-change example has a syntax error if there's a name in local storage already

[jaharnum]

If I open http://localhost:3000/isolated/examples/local-state-key-change.js with a name already stored in local storage state from testing exercise 2, the page will not load and gives a few error messages.

Uncaught SyntaxError: Unexpected token 'e', "test" is not valid JSON
    at parse (<anonymous>)
    at utils.js:18:1
    at mountState (react-dom.development.js:16986:1)
    at Object.useState (react-dom.development.js:17699:1)
    at Object.useState (react.development.js:1622:1)
    at useLocalStorageState (utils.js:15:1)
    at Greeting (local-state-key-change.js:10:1)
    at renderWithHooks (react-dom.development.js:16305:1)
    at mountIndeterminateComponent (react-dom.development.js:20074:1)
    at beginWork (react-dom.development.js:21587:1)
The above error occurred in the <Greeting> component:

    at Greeting (http://localhost:3000/static/js/src_examples_local-state-key-change_js.chunk.js:32:3)

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It works fine when I remove the name beforehand.

I am guessing this is due to the fact that I haven't completed the extra credit that turns the input name into JSON before storing it, but the useLocalStorageState in utils expects it to be in that format.

This is handled in 02.extra-4.js with a try/catch that simply removes the offending item, but not in utils.js, so it should be an easy fix :)

[kentcdodds]

Thanks for this! Would you be willing to make a pull request for this fix?