feat(cpp-target): Add exception to reserved words

Closes #3876

Signed-off-by: Kevin Traini <[email protected]>

Author: Gashmob

tool/src/org/antlr/v4/codegen/target/CppTarget.java

@@ -37,8 +37,8 @@ public class CppTarget extends Target {
 		"bitor", "bool", "break", "case", "catch", "char", "char16_t",
 		"char32_t", "class", "compl", "concept", "const", "constexpr",
 		"const_cast", "continue", "decltype", "default", "delete", "do",
-		"double", "dynamic_cast", "else", "enum", "explicit", "export",
-		"extern", "false", "float", "for", "friend", "goto", "if",
+		"double", "dynamic_cast", "else", "enum", "exception", "explicit",
+		"export", "extern", "false", "float", "for", "friend", "goto", "if",
 		"inline", "int", "long", "mutable", "namespace", "new",
 		"noexcept", "not", "not_eq", "nullptr", "NULL", "operator", "or",
 		"or_eq", "private", "protected", "public", "register",