DTM-15226 Don't include icon file when searching for required paths.

[Aaronius]

Description

This fixes a bug where, when packaging an extension, the extension developer would receive the error Unexpected token (1:0)

The problem is that if the extension had an icon, the icon file would be included in the list of files to search for require statements. Because the icon file is not JavaScript, the strip-comments process would fail when parsing the file.

Related Issue

https://jira.corp.adobe.com/browse/DTM-15226

Motivation and Context

Let extension developers package extensions successfully.

How Has This Been Tested?

I ran the updated packager on a few Adobe extensions.

Screenshots (if appropriate):

Types of changes

• [x] 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)

Checklist:

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