rename module to lowercase

src/nf_modules/bowtie2/tests.sh

src/nf_modules/bwa/indexing.config

src/nf_modules/bwa/indexing.nf

src/nf_modules/bwa/mapping_paired.config

src/nf_modules/bwa/mapping_paired.nf

src/nf_modules/bwa/tests.sh

src/nf_modules/deeptools/bam_to_bigwig.config

src/nf_modules/deeptools/bam_to_bigwig.nf

src/nf_modules/deeptools/compute_matrix.config

src/nf_modules/deeptools/compute_matrix.nf

src/nf_modules/deeptools/plot_profile.config

src/nf_modules/deeptools/plot_profile.nf

src/nf_modules/deeptools/tests.sh

src/nf_modules/fastqc/fastqc_paired.config

src/nf_modules/fastqc/fastqc_paired.nf

src/nf_modules/fastqc/fastqc_single.config

src/nf_modules/fastqc/fastqc_single.nf

src/nf_modules/fastqc/tests.sh

src/nf_modules/htseq/htseq.config

src/nf_modules/htseq/htseq.nf