Log Message:
Update databases/ruby-sequel-core to 1.5.0.  Changes from version 1.4.0
include:

* SECURITY: Fix backslash escaping of strings

* No longer depend on ParseTree, RubyInline, or ruby2ruby, but you still
  need them if you want to use the block filters

* Paginating an already paginated/limited dataset now raises an error
* Added support for arbitrary index types (including spatial indexes)
* Allow joining of multiple datasets, by making the table alias different
  for each dataset joined
* Add ability to create a graph of objects from a query, with the result
  split into corresponding tables

* Set a timeout in the Sqlite adapter, default to 5 seconds
* Quote column names in SQL generated for SQLite

* Add support for PostgreSQL partial indexes
* Support storing microseconds in postgres timestamp fields

* Fix table joining in MySQL
* Fix MySQL default values insert
* Fix renaming columns on MySQL with type :varchar

* Fix ODBC adapter improperly escaping date and timestamp values
* Fix connecting to an MSSQL server via ODBC using domain user credentials