Fix: Corrected import in Parser/Listener/Visitor

Signed-off-by: ltsbt <[email protected]>

Author: yotzol

tool/resources/org/antlr/v4/tool/templates/codegen/TypeScript/TypeScript.stg

@@ -26,10 +26,10 @@ import {
 	Interval, IntervalSet
 } from 'antlr4';
 <if(file.genListener)>
-import <file.grammarName>Listener from "./<file.grammarName>Listener.js";
+import type <file.grammarName>Listener from "./<file.grammarName>Listener.js";
 <endif>
 <if(file.genVisitor)>
-import <file.grammarName>Visitor from "./<file.grammarName>Visitor.js";
+import type <file.grammarName>Visitor from "./<file.grammarName>Visitor.js";
 <endif>
 
 // for running tests with parameters, TODO: discuss strategy for typed parameters in CI
@@ -47,7 +47,7 @@ import {ParseTreeListener} from "antlr4";
 
 <header>
 
-<file.listenerNames:{lname | import { <lname; format="cap">Context \} from "./<file.parserName>";}; separator="\n">
+<file.listenerNames:{lname | import type { <lname; format="cap">Context \} from "./<file.parserName>";}; separator="\n">
 
 <namedActions.beforeListener>
 
@@ -89,7 +89,7 @@ import {ParseTreeVisitor} from 'antlr4';
 
 <header>
 
-<file.visitorNames:{lname | import { <lname; format="cap">Context \} from "./<file.parserName>";}; separator="\n">
+<file.visitorNames:{lname | import type { <lname; format="cap">Context \} from "./<file.parserName>";}; separator="\n">
 
 <namedActions.beforeVisitor>