fix: stringify having.

Author: albin3

package.json

@@ -1,6 +1,6 @@
 {
   "name": "js-sql-parser",
-  "version": "1.1.0",
+  "version": "1.1.1",
   "description": "",
   "main": "./dist/parser/sqlParser.js",
   "scripts": {

src/stringify.js

@@ -107,6 +107,7 @@ Sql.prototype.travelSelect = function(ast) {
     this.travel(ast.groupBy);
   }
   if (ast.having) {
+    this.appendKeyword('having');
     this.travel(ast.having);
   }
   if (ast.orderBy) {

test/main.test.js

@@ -377,5 +377,9 @@ describe('select grammar support', function () {
     testParser('select a from dual order by a desc limit 1, 1 union distinct select a from foo order by a limit 1');
   });
 
+  it ('fix having', function () {
+    testParser('select a, count(*) cnt from b group by a having count(*) > 1;');
+  });
+
 });