renamed "thistype" to "this_type"

javascript/ql/src/semmle/javascript/TypeScript.qll

@@ -2386,7 +2386,7 @@ class LexicalTypeVariableType extends TypeVariableType, @lexical_type_variable_t
  * }
  * ```
  */
-class ThisType extends Type, @thistype {
+class ThisType extends Type, @this_type {
   /**
    * Gets the type containing the `this` type.
    */

javascript/ql/src/semmlecode.javascript.dbscheme

@@ -632,7 +632,7 @@ case @type.kind of
 | 17 = @intersection_type
 | 18 = @tuple_type
 | 19 = @lexical_type_variable_type
-| 20 = @thistype
+| 20 = @this_type
 | 21 = @numberliteraltype
 | 22 = @stringliteraltype
 | 23 = @unknowntype

javascript/ql/src/semmlecode.javascript.dbscheme.stats

@@ -982,7 +982,7 @@
 <v>50</v>
 </e>
 <e>
-<k>@thistype</k>
+<k>@this_type</k>
 <v>2731</v>
 </e>
 <e>