Bump postgresql from 42.2.18 to 42.2.20 in /examples

[dependabot]

Bumps postgresql from 42.2.18 to 42.2.20.

Changelog

Sourced from postgresql's changelog.

[42.2.20] (2021-04-19)

Changed

Added

Fixed

• fix: Partitioned indexes were not found fixes #2078 PR #2087

• isValid() timeout should not be blocked #1943 Cherry-picked #2076 The usage of setQueryTimeout(); with the same value as the setNetworkTimeout(); is blocking the current transaction timeout. The timeouts are blocking each other with this approach.

• DatabaseMetaData.getTables returns columns in UPPER case as per the spec [PR #2092](pgjdbc/pgjdbc#2092) fixes [Issue #830](pgjdbc/pgjdbc#830)

[42.2.19] (2021-02-18)

Notable Changes

• Now the driver uses SASLprep normalization for SCRAM authentication fixing some issues with spaces in passwords.
• If closeOnCompletion is called on an existing statement and the statement is executed a second time it will fail.

Changed

• Perf: avoid duplicate PGStream#changeSocket calls
• Fix: Actually close unclosed results. Previously was not closing the first unclosed result fixes #1903 (#1905) There is a small behaviour change here as a result. If closeOnCompletion is called on an existing statement and the statement is executed a second time it will fail.

Added

• Verify code via forbidden-apis (jdk-internal and jdk-non-portable signatures) [PR #2012](pgjdbc/pgjdbc#2012)

Fixed

• Fix Binary transfer for numeric fixes #1935
• Fix Allow specifying binaryTransferEnable even for those types that are not enabled by default
• Fix: properly set cancel socket timeout (#2044)
• Fix "Required class information missing" when old org.jboss:jandex parses pgjdbc classes [issue 2008][https://github-redirect.dependabot.com/Required class information missing after upgrade to version higher than 42.2.14 pgjdbc/pgjdbc#2008]
• Fix PGCopyInputStream returning the last row twice when reading with CopyOut API [issue 2016][https://github-redirect.dependabot.com/ the last row is repeated on the PGCopyInputStream  pgjdbc/pgjdbc#2016]
• Fix Connnection.isValid() to not wait longer than existing network timeout [PR #2040](pgjdbc/pgjdbc#2040)
• Fix Passwords with spaces (ASCII and non-ASCII) now work with SCRAM authentication (driver now uses SASLprep normalization) [PR #2052](pgjdbc/pgjdbc#2052)
• Fix DatabaseMetaData.getTablePrivileges() to include views, materialized views, and foreign tables [PR #2049](pgjdbc/pgjdbc#2049)
• Fix Resolve ParseError in PGtokenizer fixes #2050
• Fix return metadata privileges for views and foreign tables
• DatabaseMetaData.getTables returns columns in UPPER case as per the spec [PR #2092](pgjdbc/pgjdbc#2092) fixes Issue #830

Commits

• 1a15d6e Update changelog, bump version number (#2126)
• 018954b cherry-pick PR #2092 PgDatabaseMetaData.getTables() should return UPPERCASE c...
• e3ff2ac fix: Partitioned indexes were not found fixes (#2078) (#2087)
• 6cfa657 isValid() timeout should not be blocked (#1943) (#2076)
• 1b6957e Update Changelog to reflect changes in 42.2.19 (#2063)
• 7581157 move comments to correct location (#2070)
• 207ce36 remove diamond operator for java 6 build (#2069)
• 18cec59 Update CHANGELOG and posts to reflect todays date (#2067)
• 4e39b3f prepare for release 42.2.19 (#2064)
• fc25aeb fix: Actually close unclosed results. Previously was not closing the first un...
• Additional commits viewable in compare view

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