Improve emoji support detection

[kidonng]

↪️ Pull Request

Resolve #7767

Unfortunately is-unicode-supported has to be vendored since it's ESM-only.

💻 Examples

🚨 Test instructions

Assuming you are not on Windows (ironically, but this is easier to test):

# 1. Inspect $TERM
$ echo $TERM
xterm-256color
# 2. Create a dummy
$ touch index.html
# 3. Build the dummy, you should be able to see an emoji
$ yarn parcel build index.html
✨ Built in 511ms
# 4. Pretend to be Linux console and build the dummy again, should be able to see the fallback symbols:
$ TERM=linux yarn parcel build index.html
√ Built in 511ms

✔️ PR Todo

• Added/updated unit tests for this change
• Filled out test instructions (In case there aren't any unit tests)
• Included links to related issues/PRs

[height]

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[AGawrys]

Feel free to add me as a reviewer once you're satisfied with the PR TODO you listed :)

[kidonng]

@AGawrys I don't think I have the permission to do that, but I have tested it locally and provided the test instructions.