Simple-ddl-parser-2

Fixes
BigQuery:
1. Indexes without schema causes issues in BigQuery dialect - fixed.

Improvements
Oracle:
1. Added new output keywords in table definition - `temp` & `is_global`. Added support for create global temporary table - https://github.com/xnuinside/simple-ddl-parser/issues/182

Fixes
PostgreSQL:
1. Timezone was moved out from type definition to keyword 'with_time_zone' it can be True (if with time zone) or False (if without)
BigQuery:
1. Previously Range in RANGE_BUCKETS was parsed as a columns, now this behaviour is changed and
range placed in own keyword - 'range' (can be array or str).
Also for all ``*_TRUNC PARTITIONS` like DATETIME_TRUNC, TIMESTAMP_TRUNC, etc, second argument moved to arg 'trunc_by'

Improvements
PostgreSQL:
1. Added support for PostgreSQL with / without time zone - https://github.com/xnuinside/simple-ddl-parser/issues/250

BigQuery:
1. Added support for GENERATE_ARRAY in RANGE_BUCKETS https://github.com/xnuinside/simple-ddl-parser/issues/183

Fixes
MySQL:
1. Fixed issue relative to auto_increment that caused empty output if auto_increment defined in table properties -
https://github.com/xnuinside/simple-ddl-parser/issues/206

Improvements
MySQL:
1. auto_increment added as property to mysql output

Oracle:
1. Added support for constraint name in column definition - https://github.com/xnuinside/simple-ddl-parser/issues/203
2. Added support for GENERATED (ALWAYS | (BY DEFAULT [ON NULL])) AS IDENTITY in column definition

PostgreSQL:
1. Added support for CAST statement in column GENERATE ALWAYS expression - https://github.com/xnuinside/simple-ddl-parser/issues/198

Improvements
MySQL:
1. Added support for INDEX statement inside table definition
2. Added support for MySQL INVISIBLE/VISIBLE statement - https://github.com/xnuinside/simple-ddl-parser/issues/243

Snowflake:
1. Added support for cluster by statement before columns definition - https://github.com/xnuinside/simple-ddl-parser/issues/234

Improvements
1. Support functions with schema prefix in `DEFAULT` and `CHECK` statements. https://github.com/xnuinside/simple-ddl-parser/issues/240
Fixes
1. Fix for REFERENCES NOT NULL - https://github.com/xnuinside/simple-ddl-parser/issues/239
2. Fix for snowflake stage name location format bug fix - https://github.com/xnuinside/simple-ddl-parser/pull/241

Improvements
1. Fixed bug with `CREATE OR REPLACE SCHEMA`.
2. Added support of create empty tables without columns CREATE TABLE tablename (); (valid syntax in SQL)

Snowflake
1. Fixed bug with snowflake `stage_` fileformat option value equal a single string as `FIELD_OPTIONALLY_ENCLOSED_BY = '\"'`, `FIELD_DELIMITER = '|'`
2. improve snowflake fileformat key equals value into dict. type.