cromwellSingle: Submit a single cromwell job
In seandavi/wdlRunR: Interact with the Broad Institute Cromwell workflow manager

This function submits a set of one or more inputs to cromwell. It is much more efficient than submitting a single job at a time. See the cromwell batch API documentation for details.

1 2	cromwellSingle(wdlSource, workflowInputs, customLabels = NULL, workflowOptions = NULL, timeout = 120, ...)

`wdlSource`	A `list`, a JSON string (as a `character` vector of length 1, or an `upload_file` object. See details below.
`workflowInputs`	A `list`, a JSON string (as a `character` vector of length 1, or an `upload_file` object. See details below.
`workflowOptions`	A `list`, a JSON string (as a `character` vector of length 1, or an `upload_file` object. See details below.
`timeout`	The number of seconds to wait for a response. Batch jobs can take quite some time for cromwell to process, so this will typically need to be set to a large value to allow for a completed response.
`...`	passed directly to httr 'POST' (for including 'timeouts', 'handles', etc.)