added support for bit(1) column types to be converted to pg boolean
added support for bit(1) column types to be converted to pg boolean

TheRealAWebb/mysql2postgres,maxlapshin/mysql2postgres,hellojere/mysql2postgres,ContinuityControl/mysql2postgres,jibiel/mysql2postgres,denistsuman/mysql2postgres,methodmill/mysql2postgres,crohr/mysql2postgres