Update to minimum nextflow v21.04.0

Author: skrakau

.github/workflows/ci.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       matrix:
         # Nextflow versions: check pipeline minimum and current latest
-        nxf_ver: ['20.10.0', '']
+        nxf_ver: ['21.04.0', '']
     steps:
       - name: Check out pipeline code
         uses: actions/checkout@v2
@@ -46,7 +46,7 @@ jobs:
     if: ${{ github.event_name != 'push' || (github.event_name == 'push' && github.repository == 'nf-core/mag') }}
     runs-on: ubuntu-latest
     env:
-      NXF_VER: '20.10.0'
+      NXF_VER: '21.04.0'
       NXF_ANSI_LOG: false
     strategy:
       matrix:

README.md

@@ -4,7 +4,7 @@
 
 [![GitHub Actions CI Status](https://github.com/nf-core/mag/workflows/nf-core%20CI/badge.svg)](https://github.com/nf-core/mag/actions)
 [![GitHub Actions Linting Status](https://github.com/nf-core/mag/workflows/nf-core%20linting/badge.svg)](https://github.com/nf-core/mag/actions)
-[![Nextflow](https://img.shields.io/badge/nextflow-%E2%89%A520.10.0-brightgreen.svg)](https://www.nextflow.io/)
+[![Nextflow](https://img.shields.io/badge/nextflow%20DSL2-%E2%89%A521.04.0-23aa62.svg?labelColor=000000)](https://www.nextflow.io/)
 
 [![install with bioconda](https://img.shields.io/badge/install%20with-bioconda-brightgreen.svg)](https://bioconda.github.io/)
 [![Docker](https://img.shields.io/docker/automated/nfcore/mag.svg)](https://hub.docker.com/r/nfcore/mag)