FIX: add missing “merge selected posts” icon

FIX: add missing “merge selected posts” icon

diff --git a/lib/svg_sprite/svg_sprite.rb b/lib/svg_sprite/svg_sprite.rb
index 96cae00..8608a09 100644
--- a/lib/svg_sprite/svg_sprite.rb
+++ b/lib/svg_sprite/svg_sprite.rb
@@ -14,6 +14,7 @@ module SvgSprite
     "angle-up",
     "archive",
     "arrows-alt-h",
+    "arrows-alt-v",
     "arrow-down",
     "arrow-up",
     "arrow-left",

GitHub sha: 4852cee9