refactor: replaces get-stdin with process.stdin

[sverweij]

Description

• replaces get-stdin with process.stdin that ships with node by default

Motivation and Context

Working with process.stdin is arguably a tiny bit more complicated/ less elegant than with get-stdin, but does away with a 3rd party dependency that needs to be managed (& downloaded).

How Has This Been Tested?

• green ci
• additional manual testing

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Documentation only change
• Refactor (non-breaking change which fixes an issue without changing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• 📖

  • My change doesn't require a documentation update, or ...
  • it does and I have updated it

• ⚖️

  • The contribution will be subject to The MIT license, and I'm OK with that.
  • The contribution is my own original work.
  • I am ok with the stuff in CONTRIBUTING.md.