Simple-ddl-parser

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.

Improvements
1. Fixed bug with places first table property value in 'authorization' key. Now it is used real property name.
2. Fixed typo on Databricks dialect
3. improved equals symbols support within COMMENT statement.
4. turn regexp into functions

MySQL Improvements
1. UNSIGNED property after int parsed validly now

Snowflake
1. Snowflake TAG now available on SCHEMA definitions.