[listing-request] Add Hack the Rainbow

[dunebuggie]

Please paste the following information into the following text to list your hackathon:

    {
      "title": "Hack the Rainbow",
    "url": "https://near.org/rainbow/",
    "startDate": "September 15",
    "endDate": "September 30",
    "year": "2020",
    "city": "Remote",
    "host": "NEAR Protocol",
    "length": "360",
    "size": "unknown",
    "travel": "not required",
    "prize": "yes",
    "highSchoolers": "yes",
    "cost": "free",
    "twitterURL": "https://twitter.com/nearprotocol",
    "notes": ""
    }

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This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[stale[bot]]

This issue has been automatically closed because it has not had recent activity to the issue. Thank you for your contributions.