title: Can't install PyQt5 on python 3 with spyder ide
body: <p>So I'm trying to install the PyQt package so I just did this on my Anaconda Prompt:</p>
  <pre><code>C:\Users\USER&gt;pip install PyQt5
  Collecting PyQt5
    Using cached PyQt5-5.15.0-5.15.0-cp35.cp36.cp37.cp38-none-win_amd64.whl (64.5 MB)
  Collecting PyQt5-sip&lt;13,&gt;=12.8
    Using cached PyQt5_sip-12.8.0-cp37-cp37m-win_amd64.whl (62 kB)
  ERROR: spyder 4.1.4 requires pyqtwebengine&lt;5.13; python_version &gt;= &quot;3&quot;, which is not installed.
  ERROR: spyder 4.1.4 has requirement pyqt5&lt;5.13; python_version &gt;= &quot;3&quot;, but you'll have pyqt5 5.15.0 which is incompatible.
  </code></pre>
  <p>So I tried a different version with:</p>
  <pre><code>pip install --upgrade --user pyqt5==5.12
  </code></pre>
  <p>And then this happened:</p>
  <pre><code>Collecting pyqt5==5.12
    Downloading PyQt5-5.12-5.12.1_a-cp35.cp36.cp37.cp38-none-win_amd64.whl (49.4 MB)
       |████████████████████████████████| 49.4 MB 43 kB/s
  Collecting PyQt5_sip&lt;4.20,&gt;=4.19.14
    Downloading PyQt5_sip-4.19.19-cp37-none-win_amd64.whl (52 kB)
       |████████████████████████████████| 52 kB 3.8 MB/s
  ERROR: spyder 4.1.4 requires pyqtwebengine&lt;5.13; python_version &gt;= &quot;3&quot;, which is not installed.
  </code></pre>