Fix conpoment props`s value show not correct in pages when the value is not in English

[DeathShort]

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Type of change

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• Bug fix (non-breaking change which fixes an issue)

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a. Give a descriptive title to your PR.
Fix issue #282 .This issue is caused by pynecone.components.tags.tag ,when format the props, the json.dumps function use ascii encode as default. 

b. Describe your changes.
The solution is add 'ensure_ascii=False' in every case of json.dumps uses.
c. Put `closes #XXXX` in your comment to auto-close the issue that your PR fixes (if such).

[picklelo]

Looks good! You need to run the linter. See the bottom here: https://github.com/pynecone-io/pynecone/blob/main/CONTRIBUTING.md

[picklelo]

Might be worth it to add a helper function in utils.py so we never forget to add this.

[DeathShort]

Ok，I ran the linter as the doc said and commit again , please review the code.
And by the way , your guys did a fantastic job, I love this project and wish it goes well!

[picklelo]

looks good!