0.22.6 Improvements for PostgreSQL

v0.22.6

Fixes:

1. Fix for: #99
   Issue with pg_dump output:
   Now SETs with = and ; in them are parsed normally.

Improvements:

1. Added support for types with 3+ words like PostgreSQL "timestamp without time zone"
2. Added support for SEQUENCE properties with 'NO' word like NO MAXVALUE.
   It's parsed now as 'maxvalue': False}