Added missing iframe

Author: dustinmoris

RELEASE_NOTES.md

@@ -1,6 +1,10 @@
 Release Notes
 =============
 
+## 1.2.0
+
+- Added missing `iframe` element ([#9](https://github.com/giraffe-fsharp/Giraffe.ViewEngine/issues/9))
+
 ## 1.1.1
 
 - Fixed the `strf` function (see [#6](https://github.com/giraffe-fsharp/Giraffe.ViewEngine/issues/6))

src/Giraffe.ViewEngine/Engine.fs

@@ -232,6 +232,9 @@ module HtmlElements =
     let menuitem   = voidTag "menuitem"
     let summary    = tag "summary"
 
+    // Others
+    let iframe    = tag "iframe"
+
 // ---------------------------
 // Default HTML attributes
 // ---------------------------