MC-2338: 3rd party library/dependency upgrade for 2.3 pre Alpha

Author: slavvka

composer.json

@@ -29,26 +29,26 @@
         "ext-zip": "*",
         "ext-bcmath": "*",
         "lib-libxml": "*",
-        "braintree/braintree_php": "3.28.0",
+        "braintree/braintree_php": "3.34.0",
         "colinmollenhour/cache-backend-file": "~1.4.1",
-        "colinmollenhour/cache-backend-redis": "1.10.4",
-        "colinmollenhour/credis": "1.9.1",
-        "colinmollenhour/php-redis-session-abstract": "~1.3.8",
+        "colinmollenhour/cache-backend-redis": "1.10.5",
+        "colinmollenhour/credis": "1.10.0",
+        "colinmollenhour/php-redis-session-abstract": "~1.4.0",
         "composer/composer": "^1.6",
         "elasticsearch/elasticsearch": "~2.0|~5.1",
-        "magento/composer": "~1.3.0",
+        "magento/composer": "dev-MC-2338",
         "magento/magento-composer-installer": ">=0.1.11",
         "magento/zendframework1": "~1.14.0",
         "monolog/monolog": "^1.17",
         "oyejorge/less.php": "~1.7.0",
         "pelago/emogrifier": "^2.0.0",
         "php-amqplib/php-amqplib": "~2.7.0",
-        "phpseclib/mcrypt_compat": "1.0.4",
+        "phpseclib/mcrypt_compat": "1.0.5",
         "phpseclib/phpseclib": "2.0.*",
         "ramsey/uuid": "~3.7.3",
-        "symfony/console": "~4.0.0",
-        "symfony/event-dispatcher": "~4.0.0",
-        "symfony/process": "~4.0.0",
+        "symfony/console": "~4.1.0",
+        "symfony/event-dispatcher": "~4.1.0",
+        "symfony/process": "~4.1.0",
         "tedivm/jshrink": "~1.3.0",
         "tubalmartin/cssmin": "4.1.1",
         "webonyx/graphql-php": "^0.11.1",
@@ -81,13 +81,13 @@
         "zendframework/zend-view": "~2.10.0"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "~2.10.0",
+        "friendsofphp/php-cs-fixer": "~2.12.0",
         "lusitanian/oauth": "~0.8.10",
         "pdepend/pdepend": "2.5.2",
         "phpmd/phpmd": "@stable",
-        "phpunit/phpunit": "~6.2.0",
+        "phpunit/phpunit": "~6.5.0",
         "sebastian/phpcpd": "~3.0.0",
-        "squizlabs/php_codesniffer": "3.2.2"
+        "squizlabs/php_codesniffer": "3.3.0"
     },
     "replace": {
         "magento/module-marketplace": "*",