Memory parameter singleCPUMem is now possible to use

[alneberg]

The --singleCPUMem parameter was not possible to use on the commandline as it was interpretted as a string instead of a memory unit. This PR fixes this problem.

PR checklist

• This comment contains a description of changes (with reason)
• Ensure the test suite passes (nextflow run . -profile test,docker).
• Make sure your code lints (nf-core lint .).
• CHANGELOG.md is updated

[maxulysse]

Should we check if similar issues arise with --max_memory, --max_cpus, --max_time?

[maxulysse]

No need to fix this line?

sarek/conf/base.config

Line 26 in 34e871c

memory = {check_resource(params.singleCPUMem * task.attempt)}