title: Issue when installing CVX in MATLAB 2021a with cvx_setup on MacOS, cvx/sedumi/.travis.yml is missing
body: <p>I've just downloaded CVX 2.2 on my MacOS (10.14.5), unzipped CVX, started MATLAB 2021a, changed the directory to the CVX unpacked folder and ran the cvx_setup file for the installation. Installation seems successful, but I get this warning message:</p>
  <pre><code>WARNING: The following files/directories are missing:
          /Users/myname/Downloads/cvx/sedumi/.travis.yml
      These omissions may prevent CVX from operating properly.
  </code></pre>
  <p>The file is concretely missing, may it be quarantined? I tried to check if it is and remove it from quarantine with the following terminal commands:</p>
  <pre><code>xattr /Users/myname/Downloads/cvx
  com.apple.quarantine
  sudo xattr -r -d com.apple.quarantine /Users/myname/Downloads/cvx
  </code></pre>
  <p>But same warning message occurs. Have you any suggestion? What if I continue without this file?</p>