fix pileup warning, version bump 1.13.2

DESCRIPTION

@@ -1,6 +1,6 @@
 Package: MACSr
 Title: MACS: Model-based Analysis for ChIP-Seq
-Version: 1.13.1
+Version: 1.13.2
 Authors@R: c(
     person(given = "Philippa",
            family = "Doherty",

R/pileup.R

@@ -15,7 +15,7 @@
 #'     \"BOWTIE\". If the format is BAMPE or BEDPE, please specify it
 #'     explicitly. Please note that when the format is BAMPE or BEDPE,
 #'     the -B and --extsize options would be ignored.
-#' @param bothdirection By default, any read will be extended towards downstream direction by extension size. So it's [0,size-1] (1-based index system) for plus strand read and [-size+1,0] for minus strand read where position 0 is 5' end of the aligned read. Default behavior can simulate MACS3 way of piling up ChIP sample reads where extension size is set as fragment size/d. If this option is set as on, aligned reads will be extended in both upstream and downstream directions by extension size. It means [-size,size] where 0 is the 5' end of a aligned read. It can partially simulate MACS3 way of piling up control reads. However MACS3 local bias is calculated by maximizing the expected pileup over a ChIP fragment size/d estimated from 10kb, 1kb, d and whole genome background. This option will be ignored when the format is set as BAMPE or BEDPE. DEFAULT: False
+#' @param bothdirection By default, any read will be extended towards downstream direction by extension size. So it's (0,size-1) (1-based index system) for plus strand read and (-size+1,0) for minus strand read where position 0 is 5' end of the aligned read. Default behavior can simulate MACS3 way of piling up ChIP sample reads where extension size is set as fragment size/d. If this option is set as on, aligned reads will be extended in both upstream and downstream directions by extension size. It means (-size,size) where 0 is the 5' end of a aligned read. It can partially simulate MACS3 way of piling up control reads. However MACS3 local bias is calculated by maximizing the expected pileup over a ChIP fragment size/d estimated from 10kb, 1kb, d and whole genome background. This option will be ignored when the format is set as BAMPE or BEDPE. DEFAULT: False
 #' @param extsize The extension size in bps. Each alignment read will
 #'     become a EXTSIZE of fragment, then be piled up. Check
 #'     description for -B for detail. It's twice the `shiftsize` in