List istanbul.yml in vscodeignore

Author: ryu1kn

.vscodeignore

@@ -4,14 +4,14 @@ test/**
 coverage/**
 images/public.gif
 __*
-.gitattributes
-.gitignore
+.codeclimate.yml
 .editorconfig
 .eslintignore
 .eslintrc.yaml
-.travis.yml
-.codeclimate.yml
+.gitattributes
+.gitignore
+.istanbul.yml
 .nvmrc
+.travis.yml
 cli-test-mocha.opts
 jsconfig.json
-vsc-extension-quickstart.md