another python3 bugfix

Author: Martin Journois

folium/plugins/terminator.py

@@ -10,7 +10,7 @@
 # As LO.Terminator.js is not served on both HTTP and HTTPS, we need to embed it explicitely into the code.
 _request = _urlopen("http://rawi.8713187.xyz/joergdietrich/Leaflet.Terminator/master/L.Terminator.js")
 assert _request.getcode()==200, "Error while loading Leaflet.terminator.js"
-_terminator_script = _request.read()
+_terminator_script = _request.read().decode('utf8')
 
 class Terminator(Plugin):
     """Leaflet.Terminator is a simple plug-in to the Leaflet library to overlay day and night regions on maps."""