Describe the bug
A clear and concise description of what the bug is.

To Reproduce
Steps to reproduce the behavior:

1. Example SQL
   INSERT INTO tableName (id,xxx0,xxx1,xxx2,is_deleted,create_time,update_time) VALUES (?, ?, ?, ?, ?, ?, ?) on conflict(xxx0, xxx1) do update set xxx1=?, update_time=?

2. Parsing this SQL using JSqlParser with this statements

3. Exception
   Caused by: net.sf.jsqlparser.parser.ParseException: Encountered unexpected token: "conflict" <S_IDENTIFIER>
   at line 3, column 12.

Was expecting:

"DUPLICATE"

at net.sf.jsqlparser.parser.CCJSqlParser.generateParseException(CCJSqlParser.java:22439)
at net.sf.jsqlparser.parser.CCJSqlParser.jj_consume_token(CCJSqlParser.java:22286)
at net.sf.jsqlparser.parser.CCJSqlParser.Insert(CCJSqlParser.java:1792)
at net.sf.jsqlparser.parser.CCJSqlParser.SingleStatement(CCJSqlParser.java:137)
at net.sf.jsqlparser.parser.CCJSqlParser.Statements(CCJSqlParser.java:479)
at DqmTest.parseStatements(DqmTest.java:51)
... 40 more

Caused by:
net.sf.jsqlparser.parser.ParseException: Encountered unexpected token: "conflict" <S_IDENTIFIER>
at line 3, column 12.

Was expecting:

"DUPLICATE"

at net.sf.jsqlparser.parser.CCJSqlParser.generateParseException(CCJSqlParser.java:22439)
at net.sf.jsqlparser.parser.CCJSqlParser.jj_consume_token(CCJSqlParser.java:22286)
at net.sf.jsqlparser.parser.CCJSqlParser.Insert(CCJSqlParser.java:1792)
at net.sf.jsqlparser.parser.CCJSqlParser.SingleStatement(CCJSqlParser.java:137)
at net.sf.jsqlparser.parser.CCJSqlParser.Statements(CCJSqlParser.java:479)
at DqmTest.parseStatements(DqmTest.java:51)

Expected behavior
A clear and concise description of what you expected to happen.

System

• Database you are using
• Java Version
  java 11
• JSqlParser version
  3.1