allow 10 or more lanes to be used by removing leading zeros

- updates PATH environment variable to call /universc/launch_universc.sh from any working directory

- enables double or triple digit lane numbers (suppports 16 lane NovaSeq X series

scheduled for launch in Q1 2023, expected to be compatible with older models and

BGI or Ultima high throughput sequencing platforms)

### 1.2.4

- enables unit testing via nextflow for nf-core module

        case $read in

            #check if contains lane before read

            *_L0[0123456789][0123456789]_$readkey*)

            *_L[0-9][0-9][0-9]_$readkey*)

                if [[ $verbose ]]; then

                    echo "  $read compatible with lane"

                fi

        esac

        case $read in

            #check if contains sample before lane

            *_S[0123456789]_L0*)

            *_S[0123456789]_L[0-9][0-9][0-9]*)

                if [[ $verbose ]]; then

                    echo "  $read compatible with sample"

                fi

                    echo "  renaming $read ..."

                fi

                k=$((${j} + 1))

                rename -f "s/_L0/_S${k}_L0/" ${read}*

                rename -f "s/_L([0-9][0123456789][0123456789])/_S${k}_L\$1/" ${read}*

                #update file variable

                read=`echo $read | sed -e "s/_L0/_S${k}_L0/g"`

                read=`echo $read | sed -e "s/_L([0-9][0123456789][0123456789])/_S${k}_L\$1/g"`

                list[$j]=$read

            ;;

        esac

        name_fields=$fields

    fi

    sn=`echo ${name} | cut -f 1-$((${name_fields} - 4)) -d'_'`

    lane=`echo ${name} | cut -f $((${fields} - 2)) -d'_' | sed 's/L00//'`

    # removes leading zeroes from lane number

    lane=`echo ${name} | cut -f $((${fields} - 2)) -d'_' | sed 's/L0([123456789][0123456789])/\$1/' | sed 's/L00([0123456789])/\$1/'`

    # sets lane to 0 if none found

    if [[ -z ${lane} ]]; then

        lane=0

    fi

    LANE+=($lane)

    if [[ ${fields} -le 4 ]]; then

        echo "***WARNING: filename $fq is not following the naming convention. (e.g. EXAMPLE_S1_L001_R1_001.fastq)***";