Inconsistent kmer size defaults

[mbhall88]

The default kmer size for making custom panels is set to 31

mykrobe/src/mykrobe/parser.py

Lines 278 to 280 in 6a7e7f6

	parser_dump.add_argument(
	"--kmer", metavar="kmer", type=int, help="kmer length", default=31
	)

mykrobe/src/mykrobe/parser.py

Lines 315 to 317 in 6a7e7f6

	parser_make_probes.add_argument(
	"-k", "--kmer", type=int, help="kmer length", default=31
	)

However, the default mykrobe (TB) panels is built with a kmer size of 21, the docs for making probes and lineage panels suggests 21, and the default for predict is also 21

mykrobe/src/mykrobe/base.py

Line 6 in 59dfb97

DEFAULT_KMER_SIZE = os.environ.get("KMER_SIZE", 21)

This is pretty confusing. Is this intentional, or should we change these to be consistent? @martinghunt @iqbal-lab

Again, I can add this to #138 if there are any changes to be made.

[iqbal-lab]

Not intentional

[martinghunt]

Not intentional. Makes sense to change it.