travis publish step fix

.travis.yml

@@ -10,7 +10,7 @@ notifications:
   on_success: change
   on_failure: always
 after_success:
-- test $(cat $TRAVIS_BUILD_DIR/package.json | grep version | awk '{print $2}' | sed 's/"//g' | sed 's/,//g' | awk '{print "v"$1}' ) = $TRAVIS_TAG && $TRAVIS_NODE_VERSION = '0.12' && export VALID_VERSION=true
+- test $(cat $TRAVIS_BUILD_DIR/package.json | grep version | awk '{print $2}' | sed 's/"//g' | sed 's/,//g' | awk '{print "v"$1}' ) = $TRAVIS_TAG && test $(echo $TRAVIS_NODE_VERSION | awk '{print $1}' ) = '0.12' && export VALID_VERSION=true
 deploy:
   provider: npm
   email: [email protected]