Task: Trigger a build using the TravisCI node

n8n workflow:
{"id":"52","name":"Trigger a build using the TravisCI node","nodes":[{"name":"On clicking 'execute'","type":"n8n-nodes-base.manualTrigger","position":[510,350],"parameters":{},"typeVersion":1},{"name":"TravisCI","type":"n8n-nodes-base.travisCi","position":[710,350],"parameters":{"slug":"","branch":"","operation":"trigger","additionalFields":{}},"credentials":{"travisCiApi":"travisCI"},"typeVersion":1}],"active":false,"settings":{},"connections":{"TravisCI":{"main":[[]]},"On clicking 'execute'":{"main":[[{"node":"TravisCI","type":"main","index":0}]]}}}