Add alert-triangle icon

CHANGELOG.md

@@ -9,6 +9,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - Add # new icons:
   - `alert-circle`
+  - `alert-triangle`
   - `aperture`
   - `at-sign`
   - `award`

icons-manifest.json

@@ -46,6 +46,7 @@
   "airplay",
   "info",
   "alert-circle",
+  "alert-triangle",
   "bell",
   "bell-off",
   "music",

icons/alert-triangle.svg

+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="#000" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+  <path d="M10.29,3.86,1.82,18a2,2,0,0,0,1.71,3H20.47a2,2,0,0,0,1.71-3L13.71,3.86A2,2,0,0,0,10.29,3.86Z"/>
+  <line x1="12" y1="9" x2="12" y2="13"/>
+  <line x1="12" y1="17" x2="12" y2="17"/>
+</svg>
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