Updated function decleration syntax

syntaxes/mist.tmLanguage.json

@@ -212,12 +212,19 @@
           }
         },
         {
-          "match": "\\b(fn)\\s+([a-zA-Z_][a-zA-Z0-9_]*)",
+          "match": "\\b(fn)\\s+([a-zA-Z_][a-zA-Z0-9_]*)\\s+([a-zA-Z_][a-zA-Z0-9_]*)",
           "captures": {
             "1": {
               "name": "storage.type.mist"
             },
             "2": {
+              "patterns": [
+                {
+                  "include": "#types"
+                }
+              ]
+            },
+            "3": {
               "name": "entity.name.function.mist"
             }
           }
@@ -320,7 +327,7 @@
           "name": "entity.name.type.numeric.mist"
         },
         {
-          "match": "(?<![A-Za-z])(str|char|bool)\\b",
+          "match": "(?<![A-Za-z])(str|char|bool|void)\\b",
           "name": "entity.name.type.other.mist"
         },
         {