Add CI on stable 1.42
diff --git a/README.md b/README.md
index 801c14d..ea82afb 100644
--- a/README.md
+++ b/README.md
@@ -20,8 +20,7 @@
 cxx = "0.2"
 ```
 
-*Compiler support: requires rustc 1.42+ (beta on January 30, stable on March
-12)*
+*Compiler support: requires rustc 1.42+*
 
 <br>