`genome_stats.tsv` has the wrong tRNA count for MIMAG standards

[AroneyS]

Just noticed that the genome_stats.tsv is described to have "the required information for the MIMAG requirements". But as far as I can see, it includes a total count of all genes identified as tRNAs. Instead it should be a unique count of all tRNAs matching the 20 standard amino acids, quote: "tRNAs for at least 18 of the 20 possible amino acids" (see https://doi.org/10.1038/nbt.3893).