TypeError: unsupported operand type(s) for <<: 'float' and 'int'

awesome repo!!

I am getting the above error when running a fairly large and complex concave polygon with a hole ( _full trace is below_ ).

updating lines `455` and `456` to force the result to an int seems to be sufficient
`x = int(32767 * (x - minX) // size)`
`y = int(32767 * (y - minY) // size)`

```Traceback (most recent call last):
File ".../scratch_python/env/lib/python3.6/site-packages/IPython/core/interactiveshell.py", line 3343, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "", line 1, in
runfile(.../scratches/scratch.py', wdir='.../scratches')
File "/snap/pycharm-professional/230/plugins/python/helpers/pydev/_pydev_bundle/pydev_umd.py", line 197, in runfile
pydev_imports.execfile(filename, global_vars, local_vars) # execute the script
File "/snap/pycharm-professional/230/plugins/python/helpers/pydev/_pydev_imps/_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File ".../scratches/scratch.py", line 48, in
main('.../alabama_smsa.geojson')
File ".../scratches/scratch.py", line 39, in main
triangles.extend(triangulate_poly(x['geometry']['coordinates']))
File ".../scratches/scratch.py", line 14, in triangulate_poly
earcut_indexes = earcut.earcut(flat_coords['vertices'],flat_coords['holes'],flat_coords['dimensions'])
File ".../earcut/earcut.py", line 48, in earcut
earcutLinked(outerNode, triangles, dim, minX, minY, size)
File ".../earcut/earcut.py", line 106, in earcutLinked
indexCurve(ear, minX, minY, size)
File ".../earcut/earcut.py", line 369, in indexCurve
p.z = zOrder(p.x, p.y, minX, minY, size)
File ".../earcut/earcut.py", line 458, in zOrder
x = (x | (x << 8)) & 0x00FF00FF
TypeError: unsupported operand type(s) for <<: 'float' and 'int'```