fix travis-ci: PHPUnit 6 doesn't support PHP5.x

Author: dcb9

.travis.yml

@@ -5,11 +5,12 @@ php:
   - '5.5'
   - '5.6'
   - '7.0'
+  - '7.1'
 
 services:
   - redis-server
 
-before_install: echo "extension = redis.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
+before_install: v=$(phpenv version-name); if [ ${v:0:1} -lt 7 ]; then pecl install redis; else echo "extension = redis.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini; fi 
 
 install:
   - composer global require "fxp/composer-asset-plugin:^1.2.0"

README.md

@@ -18,9 +18,9 @@ It includes a `Cache` and `Session` storage handler in redis.
 Requirements
 ------------
 
-- PHP >=5.4.0 
+- PHP >= 5.4.0 
 - Redis >= 2.6.12
-- ext-redis >=2.2.7
+- ext-redis >= 2.2.7
 - Yii2 ~2.0.4
 
 Installation

composer.json

@@ -11,7 +11,7 @@
   ],
   "require": {
     "yiisoft/yii2": "~2.0.4",
-    "ext-redis": ">=2.2.5",
+    "ext-redis": ">=2.2.7",
     "php": ">=5.4.0"
   },
   "autoload": {
@@ -20,7 +20,7 @@
     }
   },
   "require-dev": {
-    "phpunit/phpunit": "*",
+    "phpunit/phpunit": "<6.0",
     "yiisoft/yii2-redis": "^2.0"
   }
 }