fix: Arrow methods did not have modifiers set properly

Fixes #1452

Author: Gerrit0

src/lib/converter/symbols.ts

@@ -572,6 +572,7 @@ function convertArrowAsMethod(
         symbol,
         nameOverride
     );
+    setModifiers(arrow.parent as ts.PropertyDeclaration, reflection);
     const rc = context.withScope(reflection);
 
     const signature = context.checker.getSignatureFromDeclaration(arrow);

src/test/converter/class/access.ts

@@ -50,4 +50,6 @@ export class PrivateClass {
      * @protected
      */
     fakeProtectedMethod() {}
+
+    private privateArrow = () => {};
 }