Change required go version to 1.11 (#80)

jared2501 · fsouza · commit dd0439581c76 · 2019-02-21T18:16:47.000-05:00
diff --git a/go.mod b/go.mod
@@ -1,5 +1,5 @@
 module github.com/NYTimes/gziphandler
 
-go 1.12
+go 1.11
 
 require github.com/stretchr/testify v1.3.0
