Update coursemology-polyglot gem.
Update coursemology-polyglot gem.

Version 0.2.5 added support for Python 3.6.

cysjonathan/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2