Update version of package.json

[favoyang]

The Git tag format hints it's the version string vyear.month.day (e.g. v2020.07.30), but since a recent update, the version of package.json has been reset to 1.0.0 and no longer updated.

To fix: either sync the version from the Git tag (like before) or sync the version to the Git tag (v1.0.1)

Suggested reading:

• Managing release with CLI https://medium.com/openupm/how-to-maintain-upm-package-part-4-managing-package-release-with-cli-972ff5311163

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The issue is detected by OpenUPM build-pipelines: https://openupm.com/packages/com.jiangyin.gameframework/nes: https://openupm.com/packages/com.jiangyin.gameframework/