Environment details

• OS: macOS
• Node.js version: 10.20.1
• npm version: 6.14.4
• @google-cloud/trace-agent version: 4.2.5

Steps to reproduce

cd samples
npm install
npm start
curl localhost:8080

-> "TypeError: The `GET` method cannot be used with a body"

Notes

It looks like this example is using the got API wrongly: The json argument is supposed to be a serializable POJO, not a boolean: https://github.com/sindresorhus/got#json