title: toad error - numpy.ndarray size changed, may indicate binary incompatibility. Expected 88 from C header, got 80 from PyObject
body: <p>I just installed <code>toad-0.0.62</code> using pip and success</p>
  <p>but when I import</p>
  <p><code>import toad</code></p>
  <p>the result</p>
  <pre><code>ValueError                                Traceback (most recent call last)
  &lt;ipython-input-70-1831ec789c33&gt; in &lt;module&gt;
  ----&gt; 1 import toad
  
  /opt/conda/lib/python3.8/site-packages/toad/__init__.py in &lt;module&gt;
  ----&gt; 1 from .merge import merge, DTMerge, ChiMerge, StepMerge, QuantileMerge, KMeansMerge
        2 from .detector import detect
        3 from .metrics import KS, KS_bucket, F1
        4 from .stats import quality, IV, VIF, WOE, entropy, entropy_cond, gini, gini_cond
        5 from .selection import select
  
  /opt/conda/lib/python3.8/site-packages/toad/merge.pyx in init toad.merge()
  
  ValueError: numpy.ndarray size changed, may indicate binary incompatibility. Expected 88 from C header, got 80 from PyObject
  </code></pre>
  <p>What I try is upgrade my numpy from <code>1.19.2</code> to <code>1.20.1</code> (requirement <code>1.18.0</code>) but still same error, I'm using <code>python 3.8.6</code></p>