Level editor: can't save text fields with certain emojis

[evemartin]

Describe the bug An error occurs when trying to save a level with certain emojis in the text fields (hint, description, subtitle)

To Reproduce Steps to reproduce the behaviour:

1. Go to the Rapid Router Level Editor and create a new level - in the hint, description, and subtitle boxes, add this emoji: https://emojipedia.org/smiling-face-with-heart-eyes
2. Click Save
3. An error will appear

Expected behaviour The level should save with the emojis

Additional context

• the emoji linked doesn't work, but some emojis do work, like the red heart
• this probably has to do with the way the emojis are encoded in the database - link to the error on GCP, link to Django docs on unicode, link to StackOverflow suggested solution