Add promise-spawn to deps.

[annajowang]

No description provided.

[gemini-code-assist]

Summary of Changes

Hello @annajowang, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request integrates the @npmcli/promise-spawn utility into the @apphosting/build package, making it available for production use within that module. This change ensures that the build process can leverage promise-based spawning of child processes, enhancing asynchronous operation handling and improving the overall robustness of the build system.

Highlights

• Dependency Addition: The @npmcli/promise-spawn package has been added as a direct production dependency to the @apphosting/build module.
• Package Version Update: The version of the @apphosting/build package has been incremented from 0.1.4 to 0.1.5.
• Dependency Type Promotion: The package-lock.json file reflects the promotion of @npmcli/promise-spawn and its sub-dependency which from development dependencies to regular production dependencies.

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[gemini-code-assist]

Code Review

This pull request adds @npmcli/promise-spawn as a dependency to the @apphosting/build package, which is necessary for its functionality. My review focuses on improving dependency management by suggesting a more specific version for the new dependency to prevent potential future build issues.

[gemini-code-assist]

Using * for dependency versions is generally discouraged for external packages as it can introduce breaking changes unexpectedly. It's better to pin to a specific major version to ensure build stability. Based on package-lock.json, ^6.0.2 would be an appropriate version range.

Additionally, the indentation for this line is inconsistent with the surrounding properties. It should be aligned with the other dependencies.

Suggested change

	"@npmcli/promise-spawn": "*",
	"@npmcli/promise-spawn": "^6.0.2",