declarative pipeline upstream trigger syntax not compiling anymore

org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
WorkflowScript: 4: Invalid parameter "upstreamProjects", did you mean "upstreamFilterStrategy"? @ line 4, column 18.
           upstream(upstreamProjects: "my_test_1")
                    ^

pipeline {
    agent any
    stages {
        stage("foo") {
            steps {
                echo "hi"
            }
        }
    }
}

pipeline {
    agent any
    triggers {
        upstream(upstreamProjects: "my_test_1")
    }
    stages {
        stage("bar") {
            steps {
                echo "hello"
            }
        }
    }
}