Fix mint start dependency installation answer detection

[jhf]

The current code for mint start does not allow usage of return/enter to select the default option of Y(es).
Example run with current mint when pressing Return to select Y

➜  ui git:(feature/mint-prototype) mint tool clean
Mint - Removing directories
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Nothing to delete.
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All done in 25μs!
➜  ui git:(feature/mint-prototype) mint start
Mint - Running the development server
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚙ Ensuring dependencies...
 ↳ Not all dependencies in your mint.json file are installed.
   Would you like to install them now? (Y/n)


⚠ Missing dependencies...━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
There was an error, exiting...

Example run with this fix when pressing Return to select Y

➜  ui git:(feature/mint-prototype) ~/Projects/mint/bin/mint tool clean
Mint - Removing directories
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Nothing to delete.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
All done in 31μs!
➜  ui git:(feature/mint-prototype) ~/Projects/mint/bin/mint start
Mint - Running the development server
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚙ Ensuring dependencies...
 ↳ Not all dependencies in your mint.json file are installed.
   Would you like to install them now? (Y/n)

⚙ Constructing dependency tree...
  ✔ Updated mint-ui (https://github.com/mint-lang/mint-ui.git)
  ✔ Updated mint-color (https://github.com/mint-lang/mint-color.git)

⚙ Resolving dependency tree...
  ◈ mint-ui ➔ 8.0.0
  ◈ mint-color ➔ 0.9.0

⚙ Copying packages...
⚙ Development server started on http://0.0.0.0:3000/
^C
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Aborted! Exiting...