title: change file names of swift package files
body: <p>I have a swift package similar to the example below, and its associated with a git repo both locally and remotely on Github.</p>
  
  <pre><code>-ProjectName
      -Sources
      -ProjectName.xcodeproj
      -ProjectNameTestsFolder
          -ProjectNameTests.swift
      -Package.swift
  </code></pre>
  
  <p>From experience, I get nervous before I change any file names associated with a git repo because I have had issues in the past. I would normally try first and then ask if I couldn't figure it out but I don't want to try something and do irreversible damage. </p>
  
  <p>Any recommendations on how I can go about changing all file names associated with ProjectName above locally? Other than the xcodeproj which I know is a little more work, can I just rename the files and commit them for the changes to take effect or is there something else I need to do as well?</p>