Update Redis.php

[5ini99]

修改缓存中的redis驱动不支持数组或对象数据存储的bug

[codecov-io]

Current coverage is 39.66%

Merging #359 into master will increase coverage by +0.02% as of 831c7e4

@@            master    #359   diff @@
======================================
  Files          109     109       
  Stmts         9305    9308     +3
  Branches         0       0       
  Methods       1086    1086       
======================================
+ Hit           3689    3692     +3
  Partial          0       0       
  Missed        5616    5616       

Review entire Coverage Diff as of 831c7e4

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