updated read simulation defaults; updated conda deps

• updated read simulation defaults
• updated conda deps
• set github actions python version to 3.9
• added vs-code devcontainer

fixed rndSeed

Fixed rndSeed bug that prevented fully reproducible community simulations

fixed zero fold coverage bug

fixed zero fold coverage bug for ht-read simulation that resulted in no read files to be generated by art-illumina

fixed zero frag bug

Fixed bug in which no fragments are simulated for a barcode

ht-read: faster simulation & fixed barcode simulation

haplotag reads: faster read simulation via file locking of each sub-process & barcodes all now definitely unique

faster ht-read simulation

faster ht-read simulation via less calling of art-illumina and also parallel processing of ref genome sizes

new temp file deletion method for HtReads

new temp file deletion method for HtReads

Added --beta-div param

Added --beta-div param to MGSIM communities

switch from pyfasta to pyfastx

Switch from pyfasta to pyfastx for HtReads. Due to a dependency conflict, py3.8 is no longer supported

small edge case bug fixes

small edge case bug fixes