fix travis typo

Author: jthrilly

.travis.yml

@@ -9,7 +9,7 @@ jobs:
         - zip "Development Protocol.netcanvas" * -r -0
         - git clone https://github.com/codaco/protocol-validation.git
         - cd protocol-validation && npm install 
-        - npm run validate-protocol ""../Development Protocol.netcanvas"
+        - npm run validate-protocol "../Development Protocol.netcanvas"
       before_deploy:
         - export TRAVIS_TAG=${TRAVIS_TAG:-$(date +'%Y%m%d%H%M%S')-$(git log --format=%h -1)}
         - git tag $TRAVIS_TAG