Fastq

Fastq is used at run time in 3 crates. It's used only as a dev dependency in 2 crates.

Depender (with downloads and own rev deps)			Fastq version
700		fasten		^0.6
		guide-counter		^0.6.0
		sumi		^0.6
2.7K	37	seq_io	dev	^0.6
		rustfastq	dev	^0.6.0