Bump Commoner version to fix EMFILE errors.

Finally found a more robust solution for the "too many open files"
problem: https://github.com/benjamn/commoner/commit/ad72ba42db.

Closes #137.
Closes #138.
Merge pull request #144 from benjamn/fix-EMFILE-jsx-errors

Bump Commoner version to fix EMFILE errors