* Test against Drupal 8.6.x-dev. (#2937)

* Updating versions of Drupal core and Lightning. (#3061)

* Updating CHANGELOG.md and setting version for 9.2.0-alpha1.

* Fixes #3055: Update memcache settings to match changes in Drupal memcache module. (#3058) (#3067)

* Require drupa/memcache equal or greater than 2.0-alpha7.
* Updating memcache settings based on change in drupal/memcache module.

* Allow PHPUnit to bootstrap from core. (#3071)

* Clarified Git hook documentation. (#3073)

* Finished updating memcache config for alpha7. (#3076)

* Finished updating memcache config for alpha7.
* Locking drupal/memcache to 2.0-alpha7 until memcache stabilizes.

* Updating CHANGELOG.md and setting version for 9.2.0-alpha2.

* Travis CI Memcache Service and Settings (#3082)

* Start memcached service and add php extension.
* Check status of memcached service.
* Use blt memcache config on CI.

* Run simplesaml config command on all composer calls. (#3051)

* Update local-development.md (#3087)

Correcting links to PHPStorm documentation on Acquia's documentation service.

* Remove memcache.yml and references to it. (#3093) (#3094)

* Cherry-pick in lost/abandoned commits from 9.x (#3072)

* VM setup tips (#3036)

* Update local-development.md to reference committing DrupalVM files.

* New guidelines for contribution. (#3045)

* Adding replication and verification step sections and clean up formatting.

* Adding new guidelines for PRs to the CONTRIBUTING docs.

* Fixes #2964: When manually deploying using a tag also push that tag to source repo. (#2992)

* Adding a cutSourceTag method and invoking when deploying tag.

* Set default deploy.tag_source config setting and check it when deploying.

* Refactoring to use a single cutTag method.

* Remove line about expectation you already have a tag on your source before you tag a release.

* Warn if user is creating a tag but tag_source option is false.

* Updating deploy documentation.

* Fixes #3053: Update requirement to drush/drush:^9.4.0. (#3078)

* Fixes #3065: Use webflo/drupal-core-require-dev instead of tracking core dev dependencies. (#3068)

* Use core's PHPUnit bootstrap file. (#3092)

* amotic -> atomic (#3098)

Fixed minor typo in code review docs.

* Support memcache on ACSF via flags. (#3096)

* Remove support for PHPUnit 5. (#3102)

* Run validation without interaction on CI. (#3070) (#3097)

* Fixes #3046: Cleaned up Pipelines docs. (#3104)

* Exclude the 'sites/settings' dir for the default list of sites. (#2994) (#3105)

Force-approving this based on the same code's approval on the 9.x branch.

* Updating CHANGELOG.md and setting version for 9.2.0-alpha3.

* Update config_split.config_split.ci.yml (#3129)

* Update README.md (#3113)

* Minor variable / comment refactor. (#3111)

* Fix the link of Memcache documentation page. (#3135)

* Remove PHP 5.6 from the list of tested versions. (#3137)

* Fixes #2945 by removing cloud hook exception for ACSF. (#2946)

* Fixes #2945: removing exception for cloud hooks on ACSF.
* Cleaning up variable use in db scrub hook.
* Adding ACSF check to post deploy and makes db scrub consistent with others.

* updating blt docs to cover ACSF memcache use. (#3136)

* Fix INSTALL.md installation directions for Drush Launcher. (#3127)

* Fixes #3118: Update theme path to more standardized D8 defaults. (#3119)

* Resolves #3106: Add 'skip_permissions_hardening' setting to local settings file template (#3107)

* Update support policies (#3147)

* Update support policies

* Update README.md

* Fix PHP syntax error in acquia simplesamlphp config. (#3141)

* 3149: Minor grammar fix (#3150)

* Fixed travis output. (#3151)

* Travis shouldn't duplicate Drupal 8.6 tests (#3152)

* Travis should test Drupal 8.7.

* Disable 8.7 tests.

* Updating CHANGELOG.md and setting version for 9.2.0.

* Prevent cache collisions in multisite db-update tasks (#3166)

* Add drush cache dir utility script.

* Enhanced Factory Hook to isolate db-update tasks to tempoary drush cache.

* Update Factory Hooks from BLT template.

* Remove redundant cache clear and rebuild to preserve drush context of current request.

* Style tweaks and setting update version number to 9.2.

* Prevent cache collisions in multisite install tasks (#3171)

* Refactor post-install hook to use temp cache dir per site, use requests instead of ENV.

* Refresh Factory Hooks from template for 9002001.

* Update version number for hook.

* Remove redundant factory hook update.

* Removed unused use statements.

* Style and phpcs updates.

* Update BLT settings for site and http/proxy detection (#3172)

* Fix auto detection of sites dir due to core changes.

* Update proxy and host detection for core updates and Acquia VCL changes.

* PHPCS fixes.

* Update deploy.md with correct Cloud Hooks links. (#3188)

The Acquia docs link pointed to a stale page and the BLT one pointed to the 8.x branch, both throwing 404's. I've updated both to point to the latest iterations of each page.

* Update to Drupal Coder 8.3.x. (#3132)

Fixes #2289 
--------

Changes proposed:
---------
(What are you proposing we change?)

- Update composer contraint on Drupal Coder newest release (8.3.1 as of this date)
- Update composer constraint on squizlabs/php_codesniffer to 3.0.1 (matching Coder)
- Remove the use of a bootstrap file with PHPCS. File paths that are not allowed by filesets won't be sniffed by default.
- Add a tests:phpcs:sniff:modified command to sniff unstaged modified or added files in repo for convenience.

* Updating CHANGELOG.md and setting version for 9.2.1.

* Merge tag '9.1.7' of github.com:acquia/blt

* PHP CS fixes.

* Restrict lightning version constraint to 8.5x.

* Revert coder to older version.

* Revert required and suggested composer merge plugin config.

* Update RoboFile.php

* Fix default drush local multisite alias bug causing test failures.

* Fix multisite test alias bug.

* Revert "Update to Drupal Coder 8.3.x. (#3132)"

fccd0d0

* Update hooks and phpcs config.

* BLT Backport of 9.2 to 9x (#3280)

* Fix comment formatting in PhpUnitCommand. (#3211)

* Fixes #3063 by updating faq and install docs to improve install profile instructions. (#3064)

* [9.2.x] Fix undefined trusted_reverse_proxy_ips #3214 (#3215)

Fixes #3214 
--------

Changes proposed:
---------
(What are you proposing we change?)

- check if trusted_reverse_proxy_ips is defined as an array
- if not, set an empty array

Steps to replicate the issue:
----------
(If this PR is not fixing a defect/bug, you can remove this section.)

1. blt setup
2. bootstrap drupal

Steps to verify the solution:
-----------
(How does someone verify that this does what you think does?)

1. apply the patch
2. blt setup / bootstrap Drupal
3. check to ensure following warning does not appear:

```
Warning: in_array() expects parameter 2 to be array, null given in require() (line 27 of /app/vendor/acquia/blt/settings/blt.settings.php).
require('/app/vendor/acquia/blt/settings/blt.settings.php') (Line: 806)
require('/app/docroot/sites/naswa_main/settings.php') (Line: 125)
Drupal\Core\Site\Settings::initialize('/app/docroot', 'sites/naswa_main', Object) (Line: 1056)
Drupal\Core\DrupalKernel->initializeSettings(Object) (Line: 655)
Drupal\Core\DrupalKernel->handle(Object) (Line: 19)
```

* Fixes #3185 to bring install and local docs inline. (#3186)

* Fixing updates 9002000 message. (#3205)

* Fixing missing semi-colon at end of line. (#3208)

* Fixes #3243 to clean up dry-run in deploy command. (#3263)

* Multisite bugfixes (#3231)

* Fix multisite test alias bug.

* Fix default drush local multisite alias bug causing test failures.

* Fix global varible scope and phpcs syntax.

* Update variable names and fix phpcs validation errors..

* Add missing phpunit-bridge package.

* Add BLT update hook for 9.1.9 release.

* Update version for 9.1.9 release.

* Revert "Lock core in 9.x branch to 8.5.6. (#3062)"

b2e0bcf

* Use assertions to resolve build failures due to phpunit 'risky tests' notice.

* Revert travis backports to debug build.

* Ensure minimum of dmore/chrome-mink-driver 2.5.0.

* Remove duplicate update hook.

* Removing changes from composer files.