Increase minimum nextflow version

nextflow.config

@@ -280,7 +280,7 @@ manifest {
     homePage        = 'https://github.com/nf-core/circrna'
     description     = """Quantification, miRNA target prediction and differential expression analysis of circular RNAs"""
     mainScript      = 'main.nf'
-    nextflowVersion = '!>=22.10.1'
+    nextflowVersion = '!>=23.04.0'
     version         = 'dev'
     doi             = ''
 }