snakemake version 5.9.1 raised an error with get_deseq2_threads called as a pointer

[Aurélien Ginolhac]

this line:

rna-seq-star-deseq2/rules/diffexp.smk

Line 75 in a83f301

 threads: get_deseq2_threads 

raised this error snakemake version 5.9.1

int() argument must be a string, a bytes-like object or a number, not 'function'

the error is not present with version 5.5.1

Replacing by threads: get_deseq2_threads() silences the error

[David Laehnemann]

Closed by #62