Bump guzzlehttp/guzzle from 6.3.0 to 6.5.6 in /testapps/build_pipeline_php56#8

dependabot[bot] wants to merge 1 commit intomasterOsedea/php-docker:masterfrom

dependabot/composer/testapps/build_pipeline_php56/guzzlehttp/guzzle-6.5.6Osedea/php-docker:dependabot/composer/testapps/build_pipeline_php56/guzzlehttp/guzzle-6.5.6Copy head branch name to clipboard