Added subscribe to releases link

README.md

@@ -10,6 +10,8 @@ Explore your data with SQL. Easily create charts and dashboards, and share them
 
 **Blazer 1.0 was recently released!** See the [instructions for upgrading](#10).
 
+:envelope: [Subscribe to releases](https://libraries.io/rubygems/blazer)
+
 ## Features
 
 - **Multiple data sources** - works with PostgreSQL, MySQL, and Redshift