Tweak default lint config (#47)

Author: vearutop

scripts/.golangci.yml

@@ -43,6 +43,8 @@ linters:
     - structcheck
     - varcheck
     - deadcode
+    - testableexamples
+    - dupword
 
 issues:
   exclude-use-default: false
@@ -61,5 +63,6 @@ issues:
       path: "_test.go"
     - linters:
         - errcheck # Error checking omitted for brevity.
+        - gosec
       path: "example_"