add regex operator support
ensure that dialect is set properly

some nodes (join, in this case) did not have the proper
sql instance set on them.
add failing tests for (NOT) IN operator with empty array or array containing null params
properly handle empty arrays or arrays containing null values given to IN / NOT IN operator
Merge pull request #165 from martinandert/in-operator-fix

Properly handle edge cases for IN / NOT IN operators
Merge pull request #163 from tmont/dialect-fix

ensure that dialect is set properly
Merge pull request #162 from rsolomo/regex

add regex operator support
Bump version
introduce literal node type
introduce literal node type: new files
fix whitespace
Merge pull request #166 from martinandert/literal-feature

Introduce LITERAL node type
Bump version
[ADD] FOR UPDATE and FOR SHARE statements
[ADD] tests for for share
Adding support for Postgres <@, @>, && ARRAY operations
Clearing up modifications to postgres.js
Merge pull request #168 from twg/add_postgres_array_operators

Add Postgres array operators `<@`, `@>`, `&&`.
Merge pull request #167 from rubymaniac/for_update_share

Added FOR UPDATE and FOR SHARE statements for postgres dialect
Bump version