Fix build due to dependency (#57)

* bump

* remove 7.4 due to php-cs-fixer issue

Author: mstaack

.travis.yml

@@ -5,9 +5,10 @@ before_install:
   - docker run -d -p 6379:6379 redislabs/redisearch:latest --protected-mode no --loadmodule /usr/lib/redis/modules/redisearch.so
 language: php
 php:
-  - '7.0'
-  - '7.1'
-  - '7.2'
+  - 7.0
+  - 7.1
+  - 7.2
+  - 7.3
 before_script:
   - printf "yes\n" | pecl install igbinary
   - composer install

composer.json

@@ -26,13 +26,13 @@
         "ethanhann/redis-raw": "^0.3"
     },
     "require-dev": {
-        "ukko/phpredis-phpdoc": "^2.2@dev",
         "phpunit/phpunit": "^6.0",
         "mockery/mockery": "^0.9.9",
         "predis/predis": "^1.1",
         "friendsofphp/php-cs-fixer": "^2.2",
         "consolidation/robo": "^1.0",
         "monolog/monolog": "^1.23",
-        "cheprasov/php-redis-client": "^1.8"
+        "cheprasov/php-redis-client": "^1.8",
+        "ukko/phpredis-phpdoc": "^5.0@beta"
     }
 }