Merge pull request #206 from williamsyy/master

Update README.md to include PaCMAP method from #202

Author: dcollins15

README.md

@@ -32,3 +32,4 @@ remotes::install_github('satijalab/seurat-wrappers')
 | CIPR | [Using CIPR with human PBMC data](http://htmlpreview.github.io/?https://github.com/satijalab/seurat-wrappers/blob/master/docs/cipr.html) | Ekiz et. al., BMC Bioinformatics 2020 | https://github.com/atakanekiz/CIPR-Package |
 | miQC | [Running miQC on Seurat objects](http://htmlpreview.github.io/?https://github.com/satijalab/seurat-wrappers/blob/master/docs/miQC.html) | Hippen et. al., bioRxiv 2021 | https://github.com/greenelab/miQC | 
 | tricycle | [Running estimate_cycle_position from tricycle on Seurat Objects](http://htmlpreview.github.io/?https://github.com/satijalab/seurat-wrappers/blob/master/docs/tricycle.html) | Zheng et. al., bioRxiv 2021 | https://www.bioconductor.org/packages/release/bioc/html/tricycle.html | 
+| PaCMAP | [Running PaCMAP on Seurat Objects](http://htmlpreview.github.io/?https://github.com/satijalab/seurat-wrappers/blob/master/docs/pacmap.html) | Wang et. al, JMLR 2021; Huang et. al, Communications Biology  2022 | https://github.com/YingfanWang/PaCMAP |