moment assumes PST instead of UTC. Change moment to create object assuming UTC to stay consistent with BQ. (#508)

Author: mingjialiu

udfs/community/cw_parse_timestamp.sqlx

@@ -23,7 +23,7 @@ CREATE OR REPLACE FUNCTION ${self()}(timeString STRING, formatString STRING)
     description="Emulates Oracle's TO_TIMESTAMP function.") AS
 """
 // Return timeString with the given formatString in BigQuery canonical ISO format
-const momentObject = moment(timeString, formatString);
+const momentObject = moment.utc(timeString, formatString);
 
 if(momentObject.isValid()) {
   return momentObject.toDate();

udfs/community/test_cases.js

@@ -3070,11 +3070,11 @@ generate_udf_test("bignumber_lte", [
 generate_udf_test("cw_parse_timestamp", [
   {
     inputs: [`"10-Sep-02 14:10:10.123000"`, `"DD-MMM-YY HH:mm:ss.SSSSSS"`,],
-    expected_output: `TIMESTAMP "2002-09-10 21:10:10.123000 UTC"`,
+    expected_output: `TIMESTAMP "2002-09-10 14:10:10.123000 UTC"`,
   },
   {
     inputs: [`"10-Sep-02 14:10:10123000"`, `"DD-MMM-YY HH:mm:ssSSSSSS"`,],
-    expected_output: `TIMESTAMP "2002-09-10 21:10:10.123000 UTC"`,
+    expected_output: `TIMESTAMP "2002-09-10 14:10:10.123000 UTC"`,
   },
   {
     inputs: [`"40-Sep-02 14:10:10123000"`, `"DD-MMM-YY HH:mm:ssSSSSSS"`,],