Running local PR tests doesn't work: Could not find a CI source for this run

[dblock]

~/source/alexa/alexa-app/dblock (danger-js)$ DANGER_GITHUB_API_TOKEN=... DANGER_TEST_REPO=matt-kruse/alexa-app DANGER_TEST_PR='90' npm run danger

> alexa-app@2.3.4 danger /Users/dblock/source/alexa/alexa-app/dblock
> danger

Could not find a CI source for this run

npm ERR! Darwin 16.1.0
npm ERR! argv "/Users/dblock/.nvm/versions/node/v5.9.1/bin/node" "/Users/dblock/.nvm/versions/node/v5.9.1/bin/npm" "run" "danger"
npm ERR! node v5.9.1
npm ERR! npm  v3.7.3
npm ERR! code ELIFECYCLE
npm ERR! alexa-app@2.3.4 danger: `danger`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the alexa-app@2.3.4 danger script 'danger'.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the alexa-app package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     danger
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs alexa-app
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!     npm owner ls alexa-app
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /Users/dblock/source/alexa/alexa-app/dblock/npm-debug.log

[orta]

Thanks - fixed by #49