Merge branch 'master' of github.com:launchdarkly/php-server-sdk

# Conflicts:
#	.ldrelease/config.yml

Author: eli-darkly

.ldrelease/config.yml

@@ -6,7 +6,7 @@ publications:
   - url: https://packagist.org/packages/launchdarkly/server-sdk
     description: Packagist
 
-circleCI:
+circleci:
   linux:
     image: ldcircleci/ld-php-sdk-release:1  # built in sdks-ci-docker project, contains PHP 7.2 + phpDocumentor