Update README.md

Update requirements to the 2021-01-26 snapshot or newer.  This is required due to updates to Swift/COM.

Author: compnerd

Diff for: README.md

@@ -9,15 +9,15 @@ Swift/Win32 aims to provide a [MVC](https://en.wikipedia.org/wiki/Model%E2%80%93
 
 ## Build Requirements
 
-- Latest Swift **Development** Snapshot (11/08 or later)<sup>[1](#snapshot-requirements)</sup>
+- Latest Swift **Development** Snapshot (2021-01-26 or later)<sup>[1](#snapshot-requirements)</sup>
 - Windows SDK 10.0.107763 or newer
 - CMake 3.16 or newer
 
 <sup><a name="snapshot-requirements">1</a></sup> Stable releases are not currently supported as they are built from release branches, and this project requires the latest development snapshot from the `main` branch.<br/>
 
 ## Building
 
-This project requires the latest Swift snapshot (November 08, 2020 or newer). You can use the the snapshot binaries from [swift.org](https://swift.org/download/) or download the nightly build from [Azure](https://dev.azure.com/compnerd/swift-build).
+This project requires the latest Swift snapshot (January 26, 2021 or newer). You can use the the snapshot binaries from [swift.org](https://swift.org/download/) or download the nightly build from [Azure](https://dev.azure.com/compnerd/swift-build).
 
 ### Recommended (CMake)