v4.2.0

Features

• Pcaexplorer pcaplot (#1728) (8563e88)

Performance Improvements

• autobump bio/bbtools (#3127) (a9bd6df)
• autobump bio/gatk3/printreads (#3129) (97b2c9d)
• autobump bio/last/lastal (#3131) (2c13329)
• autobump bio/last/lastdb (#3130) (ce9dfd4)
• autobump bio/multiqc (#3132) (b5bb552)
• autobump bio/reference/ensembl-mysql-table (#3133) (065d45e)