Fix syntax error in travis.yaml

.travis.yml

@@ -17,7 +17,7 @@ jobs:
     - stage: build
       script: ./gradlew build -x test
     - stage: build-docker-image
-      scrip:
+      script:
         - echo "$DOCKER_PASSWORD" | docker login -u "$DOCKER_USERNAME" --password-stdin
         - docker build -t $DOCKER_USERNAME/halo .
         - docker images