Bump sequel from 5.13.0 to 5.14.0

[dependabot-preview]

Bumps sequel from 5.13.0 to 5.14.0.

Changelog

Sourced from sequel's changelog.

=== 5.14.0 (2018-11-01)

• Drop defaulting the :port option to 5432 in the postgres adapter, so that setting the :service option in :driver_options works (jeremyevans) (#1558)

• Do not cache values for columns without parseable defaults when using :cache option in defaults_setter plugin (jeremyevans)

• Emulate NULLS FIRST/LAST ordering on databases that do not natively support it (jeremyevans)

• Do not modify boolean expressions created from string or array if string or array is modified (jeremyevans)

• Make roots and roots_dataset dataset methods instead of class methods in the tree plugin (JelF) (#1554)

• Do not cache dataset SQL if dataset uses subquery that cannot cache SQL (jeremyevans)

• Make Model#=== work correctly for models with composite primary keys (jeremyevans)

• Add Model#pk_equal? as a more descriptive name for Model#=== (AlexWayfer) (#1550)

• Do not push down expression inversion in cases where it may result in incorrect behavior (e.g. ANY/SOME/ALL operators) (jeremyevans) (#1549)

Commits

• f05ecf2 Bump version to 5.14.0
• 0b017d7 Skip some constraint validations tests on Oracle
• 34e4054 Emulate NULLS FIRST/LAST on DB2
• 652b2dc Normalize some RDocs
• 0e9e0ac Drop defaulting the :port option to 5432 in the postgres adapter, so that set...
• 8b6f117 Do not cache values for columns without parseable defaults when using :cache ...
• 51d96b8 Emulate NULLS FIRST/LAST ordering on databases that do not natively support it
• 1b44fd3 Use clearer SQL in constraint_validations extension for multiple columns when...
• 6b4d6d5 Improve Sequel.case documentation
• 8839dfd Add project metadata to the gemspec
• Additional commits viewable in compare view

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