Use wp-cli 1.4.1

Dockerfile

@@ -16,7 +16,7 @@ ADD wp-config.php.template /app/code/wp-config.php.template
 RUN mkdir -p /run/wordpress/sessions && \
     ln -sf /run/wordpress/wp-config.php /app/code/wp-config.php
 
-RUN curl -L -o /app/code/wp https://github.com/wp-cli/wp-cli/releases/download/v1.1.0/wp-cli-1.1.0.phar
+RUN curl -L -o /app/code/wp https://github.com/wp-cli/wp-cli/releases/download/v1.4.1/wp-cli-1.4.1.phar
 RUN chmod +x /app/code/wp
 RUN /bin/echo -e "apache_modules:\n  - mod_rewrite" > /app/code/wp-cli.yml