title: GeoPandas .to_crs running into errors
body: <p>I'm trying to import a shape file and change its crs in order to get a map with the correct projection. </p>
  
  <pre><code>map_sh = gpd.read_file(r'C:\PATH\VG250_Gemeindegrenzen_2018.shp')
  map_sh = map_sh.to_crs({'init' :'epsg:25832'})
  </code></pre>
  
  <p>When I try executing it, I will get the following error:</p>
  
  <pre><code>RuntimeError                              Traceback (most recent call last)
  &lt;ipython-input-7-8354f57e24ce&gt; in &lt;module&gt;
  ----&gt; 1 map_sh = map_sh.to_crs({'init' :'epsg:25832'})
  
  ~\AppData\Local\Continuum\miniconda3\lib\site-packages\geopandas\geodataframe.py in to_crs(self, crs, epsg, inplace)
      441         else:
      442             df = self.copy()
  --&gt; 443         geom = df.geometry.to_crs(crs=crs, epsg=epsg)
      444         df.geometry = geom
      445         df.crs = geom.crs
  
  ~\AppData\Local\Continuum\miniconda3\lib\site-packages\geopandas\geoseries.py in to_crs(self, crs, epsg)
      302             except TypeError:
      303                 raise TypeError('Must set either crs or epsg for output.')
  --&gt; 304         proj_in = pyproj.Proj(self.crs, preserve_units=True)
      305         proj_out = pyproj.Proj(crs, preserve_units=True)
      306         project = partial(pyproj.transform, proj_in, proj_out)
  
  ~\AppData\Local\Continuum\miniconda3\lib\site-packages\pyproj\__init__.py in __new__(self, projparams, preserve_units, **kwargs)
      360         # on case-insensitive filesystems).
      361         projstring = projstring.replace('EPSG','epsg')
  --&gt; 362         return _proj.Proj.__new__(self, projstring)
      363 
      364     def __call__(self, *args, **kw):
  
  _proj.pyx in _proj.Proj.__cinit__()
  
  RuntimeError: b'no arguments in initialization list'
  </code></pre>
  
  <p>I already had this specific error and could solve it by updating pyproj to version 2.2.1, but since yesterday I get the same error again.</p>
  
  <p>What could have changed, that from one day to another the code is running into errors? How can I check which version of pyproj my code is running? I only know the command:</p>
  
  <pre><code>pip freeze
  </code></pre>