title: How to update miniconda and Spyder 4.2.1
body: <p>When I opened Spyder, I saw a message of</p>
  <pre><code>Spyder 4.2.1 is available! Instead, run the following commands in a terminal 
  conda update anaconda
  conda install spyder=4.2.1&quot;
  </code></pre>
  <p>I installed miniconda before, so I opened anaconda prompt, then type in</p>
  <pre><code>conda update anaconda
  
  PackageNotInstalledError: Package is not installed in prefix.
    prefix: C:\Users\yongn\miniconda3
    package name: anaconda
  </code></pre>
  <p>then I switched to</p>
  <pre><code>conda update miniconda
  </code></pre>
  <p>and I got same error:</p>
  <pre><code>PackageNotInstalledError: Package is not installed in prefix.
    prefix: C:\Users\yongn\miniconda3
    package name: miniconda
  </code></pre>
  <p>any suggestion on how to update miniconda?</p>