I get TypeError cannot read property '0' null when running npm run deploy either locally or in the virtual machine.

TypeError: Cannot read property '0' of null
at Function.module.exports.Commit.actor (/var/www/uw-stout.local/styleguide/node_modules/butler/node_modules/gulp-gh-pages/node_modules/gift/lib/commit.js:145:56)
at Function.module.exports.Commit.parse_commits (/var/www/uw-stout.local/styleguide/node_modules/butler/node_modules/gulp-gh-pages/node_modules/gift/lib/commit.js:111:21)
at /var/www/uw-stout.local/styleguide/node_modules/butler/node_modules/gulp-gh-pages/node_modules/gift/lib/commit.js:71:39
at ChildProcess.exithandler (child_process.js:745:7)
at ChildProcess.emit (events.js:110:17)
at maybeClose (child_process.js:1019:16)
at Process.ChildProcess._handle.onexit (child_process.js:1091:5)

I've traced this to an error with the gulp-gh-pages module and from there to its dependent gift module:
notatestuser/gift#96

It looks like there is a pushed fix. Is there any way to update butler to get that fix in place?