Document minimum Swift version

kateinoigakukun · kateinoigakukun · commit 4629b0ac1c64 · 2026-06-10T23:51:20.000+01:00
diff --git a/README.md b/README.md
@@ -5,6 +5,8 @@
 
 Swift framework to interact with JavaScript through WebAssembly.
 
+Minimum supported Swift toolchain: 6.3.
+
 ## Quick Start
 
 Check out the [Hello World](https://swiftpackageindex.com/swiftwasm/JavaScriptKit/tutorials/javascriptkit/hello-world) tutorial for a step-by-step guide to getting started.
