feat: Support not equals operator with a hat (#2153)

Support not equals operator with hat (^=), which is supported in Exasol https://docs.exasol.com/db/latest/sql_references/predicates/comparison_predicates.htm for example

Co-authored-by: Stefan Steinhauser <stefan.steinhauser@arz.at>

Author: ssteinhauser

src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt

@@ -557,6 +557,7 @@ TOKEN : /* Operators */
 |   <OP_MINORTHANEQUALS: "<" (<WHITESPACE>)* "=">
 |   <OP_NOTEQUALSSTANDARD: "<" (<WHITESPACE>)* ">">
 |   <OP_NOTEQUALSBANG: "!" (<WHITESPACE>)* "=">
+|   <OP_NOTEQUALSHAT: "^" (<WHITESPACE>)* "=">
 |   <OP_CONCAT: "|" (<WHITESPACE>)* "|">
 | 	<OP_DOUBLEAND: "&&">
 | 	<OP_CONTAINS: "&>">
@@ -4081,6 +4082,7 @@ Expression RegularCondition() #RegularCondition:
         | token=<OP_MINORTHANEQUALS> { result = new MinorThanEquals(token.image); }
         | token=<OP_NOTEQUALSSTANDARD> { result = new NotEqualsTo(token.image); }
         | token=<OP_NOTEQUALSBANG> { result = new NotEqualsTo(token.image); }
+        | token=<OP_NOTEQUALSHAT> { result = new NotEqualsTo(token.image); }
         | "*=" { result = new TSQLLeftJoin(); }
         | "=*" { result = new TSQLRightJoin(); }
         | token=<OP_DOUBLEAND> { result = new DoubleAnd(); }