Kotlin: Add support for Kotlin type aliases

java/ql/lib/semmle/code/Location.qll

@@ -43,6 +43,8 @@ predicate hasName(Element e, string name) {
   arrays(e, name, _, _, _, _, _)
   or
   modifiers(e, name)
+  or
+  kt_type_alias(e, name, _)
 }
 
 /**

java/ql/lib/semmle/code/java/KotlinType.qll

@@ -25,3 +25,10 @@ class KotlinNotnullType extends KotlinType, @kt_notnull_type {
   override string getAPrimaryQlClass() { result = "KotlinNotnullType" }
 }
 
+class KotlinTypeAlias extends Element, @kt_type_alias {
+  override string getAPrimaryQlClass() { result = "KotlinTypeAlias" }
+
+  KotlinType getKotlinType() {
+    kt_type_alias(this, _, result)
+  }
+}