Update DESCRIPTION and NAMESPACE for changes in ATAC functions

DESCRIPTION

@@ -8,7 +8,7 @@ Maintainer: Dongqing Sun<dongqingsun96@gmail.com>, Gali Bai<gali.bai@hotmail.com
 Description: MAESTRO is an intergrative analysis pipeline to support downstream analysis of single-cell RNA-seq and single-cell ATAC-seq dataset. MAESTRO provides funtion for quality control, normalization, clustering, differential gene and peak analysis, marker gene based annotation, transcription factor identification using Cistome toolkit, and intergrative analysis for scRNA-seq and scATACseq.
 URL: https://github.com/LiuLab-dfci/MAESTRO
 Depends: R (>= 3.6.1)
-Imports: Seurat (>= 3.1.2), Signac (>=1.1.1), ggplot2 (>= 3.0.0), ggrepel, cowplot, Matrix (>=
+Imports: Seurat (>= 3.1.2), Signac (>= 1.1.1), ggplot2 (>= 3.0.0), ggrepel, cowplot, Matrix (>=
          1.2.14), dplyr, png, RColorBrewer, scales, pheatmap, MAGeCKFlute, DESeq2, Gmisc,
          grid, karyoploteR, presto, AnnotationDbi, org.Hs.eg.db, org.Mm.eg.db, GenomeInfoDb
 Suggests: knitr, pagoda2, RCA, MAST, scABC, devtools, uwot, cisTopic, chromVAR, motifmatchr,

NAMESPACE

@@ -42,11 +42,12 @@ export(VisualizeVlnplot)
 export(knn_smoothing)
 import(EnsDb.Hsapiens.v86)
 import(EnsDb.Mmusculus.v79)
+import(GenomeInfoDb)
+import(Signac)
 import(biomaRt)
 import(ggplot2)
 import(gplots)
 importClassesFrom(Matrix,dgCMatrix)
-importFrom(GenomeInfoDb,seqlevelsStyle)
 importFrom(GenomicRanges,GRanges)
 importFrom(Gmisc,fastDoCall)
 importFrom(MASS,glm.nb)
@@ -76,14 +77,9 @@ importFrom(Seurat,TransferData)
 importFrom(Seurat,VariableFeatures)
 importFrom(Seurat,VlnPlot)
 importFrom(Seurat,WhichCells)
-importFrom(Signac,Annotation)
-importFrom(Signac,CreateChromatinAssay)
 importFrom(Signac,FindTopFeatures)
-importFrom(Signac,GeneActivity)
-importFrom(Signac,GetGRangesFromEnsDb)
 importFrom(Signac,RunSVD)
 importFrom(Signac,RunTFIDF)
-importFrom(Signac,genome)
 importFrom(SummarizedExperiment,SummarizedExperiment)
 importFrom(devtools,source_url)
 importFrom(dplyr,"%>%")