fix(version): recognize .prettierignore when formatting files

[fahslaj]

Description

Checks to see if a file should be ignored by prettier before formatting it at the end of lerna version.

Motivation and Context

This will allow files that are automatically updated via lerna version to be ignored by prettier, such as lockfiles and package.json files.
#3476

How Has This Been Tested?

This has been tested manually and covered by e2e tests.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (change that has absolutely no effect on users)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.