title: Cannot resolve Swift packages after 15th March 2022 in Xcode
body: <p>Package resolution is suddenly failing in Xcode. I tried the following options:</p>
  <ol>
  <li>Reset cache under <code>File/Packages/Reset Package Caches</code></li>
  <li>Delete shared SPM cache using <code>rm -Rf ~/Library/Caches/org.swift.swiftpm/</code></li>
  </ol>
  <p>I can see the following error for different packages.</p>
  <blockquote>
  <p>You're using an RSA key with SHA-1, which is no longer allowed. Please use newer client or a different key type.</p>
  </blockquote>