Update drush/drush from 9.4.0 to 9.5.1

[violinist-bot]

If you have a decent test suite, and your tests pass, it should be both safe and smart to merge this update.

Here is a list of changes between the version you use, and the version this pull request updates to:

• 1d96b85a Prep for 9.5.1
• c6098f8d Fix #3730. Remove patch to drupal/core (#3735)
• 34375f59 Back to 9.6.0-dev.
• f386fb7a prep for 9.5.0
• 1e5029eb Add usage hint about detecting pending entity updates.
• ab8e8a7c Fix #3586. entup is always is clearing cache.
• 136f961e Fixed notice Undefined variable: translationOptions (#3723)
• 93e36e57 Remove query_extra in dumpCmd for sqlite.
• 8fd92aa3 Fix .env file loading
• b61868d0 SUT improvements - nothing for end users (#3728)
• 17645533 Under Windows+Postgres, "PGPASSFILE=..." is interpreted as a command (not found)
• df6fba0d Fix #2282, #2079. Do not pass this->query_extra to pg_dump. Refs #3727.
• 3f3449d8 Pass -A by default to mysql connections. Speeds up connect time. (#3727)
• f32c6ebd Add way to clear cache bin(s) by name via 'drush cc bin [name]' (#3726)
• 559828e3 Bump chi-teck/drupal-code-generator dependency.
• 8ef3266b bugfix in pgsql sql driver : options --data-only and --create-db were always active (#3685)
• 7e66557f Compatibility with new Tideways XHProf extension. (#3707)
• 0c59d31f FIx typo in code comment
• 8bce834c Suppress deprecation notices in testing container
• 9ea9f581 Fix #3705. Comment out nuisance lines in example.drush.yml
• 83921536 Remove fifth argument of error handler. (#3713)
• 3b8caf2f Add phpcs.xml file.
• 9286c7f7 Remove preachy advice from contribution guidelines.
• c99c80f1 CS
• b136aa34 Don't delete built-in users during entity:delete.
• 9ecb898c Correct that doc.
• afe407c7 Update example for uli command.
• 80966062 Use new native isHidden() method in Help. Also mark SUT commands as hidden. (#3698)
• d39847d5 Update to Symfony 3.4 as minimum. (#3697)
• 175a1715 Move constructor above other methods.
• bb82da3b Get rid of UNISH_DRUPAL_MAJOR_VERSION constant.
• d5c56d08 Fix .env.example syntax
• a316e21e Avoid a couple exceptions.
• a12639e2 Functional tests compatible with PHPUnit 6. (#3694)
• 870c3c41 Fix SiteAliasManager::getMultiple (#3695)
• 75340711 Fix config:export not deleting collections (#3690)
• e9f276aa Provide docker-compose for running tests and developing Drush (#3691)
• 8d18c59f Retain 'contrib' / 'custom' paths for site-wide Drush extensions (#3687)
• 7a51a7c0 Fix and secure URL-s in docs' index (#3689)
• 5e47ec93 Make the link to example commands absolute so it works from docs.drush.org. (#3688)
• abd065cd Update cron.md - invert env / docroot order (#3686)
• f7fd4b7f Move sandbox and SUT alongside Drush, instead of in a tmp dir (#3682)
• c3386584 Test that updates that throw a fatal error exit with a valid error code. (#3386)
• 346f165c Fixes #3672: Call Boot::terminate() in a shutdown handler. (#3680)
• af64eb79 Add command to import .po files (#3521)
• ddca6619 Fix help example for php:script
• 97f8f0b6 Fix undefined variable preflightArgs notice (#3679)
• a330e39d Add a cache clear option for plugin cache.
• 40b149e7 Fix 3376. When an update fails, updatedb is still exiting with 0. (#3673)
• 92abb4d5 Add code comemnt about a Drupal deprecation.
• 85ac9137 Bump the Drupal versions we use at CircleCI. (#3674)
• b59af6e1 back to dev.

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