Merge pull request #2313 from Bulani/new-icon-firebird

new icon: firebird (original, plain)

Author: canaleal

devicon.json

@@ -3499,6 +3499,24 @@
         "color": "#ffa000",
         "aliases": []
     },
+    {
+        "name": "firebird",
+        "altnames": [],
+        "tags": [
+            "database"
+        ],
+        "versions": {
+            "svg": [
+                "original",
+                "plain"
+            ],
+            "font": [
+                "plain"
+            ]
+        },
+        "color": "#f4790e",
+        "aliases": []
+    },
     {
         "name": "firefox",
         "altnames": [