Add clarification on 2015 edition usage

eupn · web-flow · commit 0bb84573a3d5 · 2020-05-02T19:17:36.000+08:00
diff --git a/README.md b/README.md
@@ -2,6 +2,9 @@
 
 **Minimum Supported Rust Version:** 1.22.0
 
+*This crate uses "2015" edition and won't be ported over "2018" edition
+in the near future as this will change the MSRV to 1.31.*
+
 # Miniscript
 
 Library for handling [Miniscript](http://bitcoin.sipa.be/miniscript/),
