Update README

Author: kpeu3i

README.md

@@ -24,7 +24,7 @@ The library provides the following features:
 
 ## Installation
 
-    $ go install github.com/kpeu3i/fielder@v1.3.0
+    $ go install github.com/kpeu3i/fielder@v1.4.0
 
 ## Usage