Do not allow strings in type annotations

Author: a-stewart

grammars/Kotlin.tmLanguage.json

@@ -384,7 +384,7 @@
             ]
         },
         "type-annotation": {
-            "match": "(?<![:?]):\\s*(\\w|\\?|\\s|->|(?<GROUP>[<(]([^<>()]|\\g<GROUP>)+[)>]))+",
+            "match": "(?<![:?]):\\s*(\\w|\\?|\\s|->|(?<GROUP>[<(]([^<>()\"]|\\g<GROUP>)+[)>]))+",
             "captures": {
                 "0": {
                     "patterns": [