Simple-ddl-parser

Fixes:

1. Fixed issues with COMMENT statement in column definitions. Add bunch of tests, now they expect working ok.

1. Added support for PARTITION BY (previously was only PARTITIONED BY from HQL)

1. Added support for ` quotes in column & tables names

Fixes:
1. Issue with '\t' reported in https://github.com/xnuinside/simple-ddl-parser/issues/53

Features:
1. Added base for future BigQuery support: added output_mode="bigquery". Pay attention that there is no schemas in BigQuery, so schemas are Datasets.

**Features**

1. Added support for base Snowflake SQL Dialect.
Added new --output-mode='snowflake' (add "clone" key)

Added support for CREATE .. CLONE with same behaviour as CREATE .. LIKE
Added support for CREATE .. CLONE for schemas and database - displayed in output as {"clone": {"from": ... }}
CREATE TABLE .. CLUSTER BY ..
CONSTRAINT .. [NOT] ENFORCED (value stored in 'primary_key_enforced')

2. in CREATE DATABASE properties that goes after name like key=value now parsed valid. Check examples in tests
3. Added support for varchar COLLATE column property

**Features**
1. Added base support for AWS Redshift SQL dialect.
Added support for ENCODE property in column.
Added new --output-mode='redshift' that add to column 'encrypt' property by default.
Also add table properties: distkeys, sortkey, diststyle, encode (table level encode), temp.

Supported Redshift statements: SORTKEY, DISTSTYLE, DISTKEY, ENCODE

CREATE TEMP / TEMPORARY TABLE

syntax like with LIKE statement:

create temp table tempevent(like event);