Bump postgresql from 42.2.10 to 42.2.12 in /examples

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Bumps postgresql from 42.2.10 to 42.2.12.

Changelog

Sourced from postgresql's changelog.

[42.2.12] (2020-03-31)

Notable changes

We have released 42.2.12 to correct regressions in this version: Specifically

• PR 1729 was reverted as this is a breaking change
• PR 1719 has been reverted as it introduced errors in the PgType Cache

We recommend that this version 42.2.11 not be used.

Changed

• reverted PR 1729 throw an error instead of silently rolling back a commit error. This change introduced a breaking change which will be moved to 42.3.0
• reverted PR 1719 add support for full names of data types (#1719)

[42.2.11] (2020-03-07)

Changed

• Reverted PR 1641. The driver will now wait for EOF when sending cancel signals.
• DatabaseMetaData#getProcedures returns only procedures (not functions) for PostgreSQL 11+ PR 1723
• Convert silent rollbacks into exception if application sends commit or xa.prepare command PR 1729

Added

• feat: raiseExceptionOnSilentRollback connection option to configure if silent rollback should raise an exception PR 1729
• feat: Expose ByteStreamWriter in CopyManager PR 1702
• feat: add way to distinguish base and partitioned tables in PgDatabaseMetaData.getTables PR 1708
• refactor: introduce tuple abstraction (rebased) PR 1701
• refactor: make PSQLState enum consts for integrity constraint violations PR 1699
• test: add makefile to create ssl certs PR 1706

Fixed

• fix: Always use . as decimal separator in PGInterval PR 1705
• fix: allow DatabaseMetaData.getColumns to describe an unset scale PR 1716

Commits

• f06c15e [maven-release-plugin] prepare release REL42.2.12
• 12757b7 changelog for 42.2.12 (#1747)
• 14576f4 Revert "fix: convert silent rollbacks into exception if application sends com...
• 49d66e4 Revert "fix: add support for full names of data types (#1719)"
• 3871bfd Remove merge aritfacts and fix a typo (#1741)
• 509187b [maven-release-plugin] prepare for next development iteration
• 2083cf4 [maven-release-plugin] prepare release REL42.2.11
• 41d267b docs: changelog for 42.2.11 (#1720)
• aa1b93f test: Add test to check sort order of PGProperty values
• 3ea0812 fix: Correct sort order of PGProperty.ASSUME_MIN_SERVER_VERSION
• Additional commits viewable in compare view

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