Set minimum nextflow version

workflow/nextflow.config

@@ -66,5 +66,5 @@ manifest {
   description = 'This pipeline was created to be a standard mRNA-sequencing analysis pipeline which integrates with the GUDMAP and RBK consortium data-hub.'
   mainScript = 'rna-seq.nf'
   version = 'v0.0.1_indev'
-  nextflowVersion = '>=19.09.0'
+  nextflowVersion = '>=0.31.0'
 }