Merge pull request #542 from sateeshperi/dev

update metro map 4.0.0

Author: sateeshperi

README.md

@@ -22,7 +22,7 @@
 
 **nf-core/methylseq** is a bioinformatics analysis pipeline used for Methylation (Bisulfite) sequencing data. It pre-processes raw data from FastQ inputs, aligns the reads and performs extensive quality-control on the results.
 
-![nf-core/methylseq metro map](docs/images/3.0.0_metromap.png)
+![nf-core/methylseq metro map](docs/images/4.0.0_metromap.png)
 
 The pipeline is built using [Nextflow](https://www.nextflow.io), a workflow tool to run tasks across multiple compute infrastructures in a very portable manner. It uses Docker / Singularity containers making installation trivial and results highly reproducible.