execute deployers sequentially

[tripodsan]

the builder runs each step of the deployers using Promise.all, which leads to confusing outputs.
although its faster to run all concurrently, it would produce a nicer output if they are executed sequentially.

the current output looks like:

[github-actions]

🎉 This issue has been resolved in version 1.7.0 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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