v0.22.0 - fixes & refactoring before adding the support for BigQuery dialect

v0.22.0

New Features:

BigQuery:

I started to add partial support for BigQuery

1. Added support for OPTIONS in CREATE SCHEMA statement

MSSQL:

1. Added support for PRIMARY KEY CLUSTERED - full details about clusterisation are parsed now in separate key 'clustered_primary_key'.
   I don't like that but when I started I did not thought about all those details, so in version 1.0.* I will work on more beutiful and logically output structure.
   #91

Pay attention: previously they parsed somehow, but in incorrect structure.

Improvements:

1. Strings in double quotes moved as separate token from ID to fix a lot of issues with strings with spaces inside
2. Now parser can parse statements separated by new line also (without GO or ; at the end of statement) - #90

Fixes:

1. Now open strings is not valid in checks (previously the was parsed.) Open string sample 'some string (exist open quote, but there is no close quote)
2. Order like ASC, DESK in primary keys now parsed valid (not as previously as column name)