0.4.0

Changed

• Switch from using snafu and failure for error handling to anyhow and thiserror. Based on the procedure outlined in this excellent blog post.
• Switched fasta/q parsing to use needletail
  instead of rust-bio. See benchmark for improvement in runtimes.
• Changed the way Illumina paired reads are subsampled. Previously, there was an
  assumption made that the reads of a pair were both the same length as the R1 read. We
  are now more careful and look at each read's length individually [#22]
• Moved container hosting to quay.io