Update readme with new augur reqs

README.md

@@ -52,10 +52,8 @@ with a [containerized Nextstrain installation](https://nextstrain.org/docs/getti
 
 The resulting output JSON at `auspice/ncov.json` can be visualized by running `auspice view --datasetDir auspice` or `nextstrain view auspice/` depending on local vs containerized installation.
 
-_This requires [Augur](https://github.com/nextstrain/augur) version >=6.2.0, released Jan 25, 2020._
+_This requires [Augur](https://github.com/nextstrain/augur) version >=6.3.0, released Feb 13, 2020._
 
 ## Notes
 
-There were apparently spurious SNPs present in the nCoV samples in the first and last few bases of the alignment that were masked as likely sequencing artifacts. A SNP at 18529 in BetaCoV/Wuhan/IVDC-HB-04/2020 appears directly adjacent to a long stretch of ambiguous bases and so has also been masked.
-
-Site numbering and genome structure uses [BetaCoV/Wuhan-Hu-1/2019](https://www.ncbi.nlm.nih.gov/nuccore/MN908947) as reference. The phylogeny is rooted relative to early samples from Wuhan. Temporal resolution assumes a nucleotide substitution rate of 3 × 10^-4 subs per site per year. There were SNPs present in the nCoV samples in the first and last few bases of the alignment that were masked as likely sequencing artifacts. The sample Wuhan/IPBCAMS-WH-05/2020 has been dropped from the analysis due to the appearance of clustered, spurious SNPs.
+Site numbering and genome structure uses [BetaCoV/Wuhan-Hu-1/2019](https://www.ncbi.nlm.nih.gov/nuccore/MN908947) as reference. The phylogeny is rooted relative to early samples from Wuhan. Temporal resolution assumes a nucleotide substitution rate of 5 × 10^-4 subs per site per year. There were SNPs present in the nCoV samples in the first and last few bases of the alignment that were masked as likely sequencing artifacts.