upgrade fastjson to 1.2.60

[qixiaobo]

upgrade fastjson to 1.2.60 for security problem
https://help.aliyun.com/noticelist/articleid/1060052050.html?spm=a2c4g.789213612.n2.8.ddd861419LgwrZ
https://github.com/qixiaobo/fastjson-oom

[codecov-io]

Codecov Report

Merging #5038 into 2.6.x will decrease coverage by 0.09%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##              2.6.x    #5038     +/-   ##
===========================================
- Coverage     47.39%   47.29%   -0.1%     
+ Complexity     4392     4386      -6     
===========================================
  Files           562      562             
  Lines         25053    25053             
  Branches       4426     4426             
===========================================
- Hits          11873    11848     -25     
- Misses        11356    11375     +19     
- Partials       1824     1830      +6

Impacted Files	Coverage Δ	Complexity Δ
.../remoting/transport/netty4/NettyServerHandler.java	72.22% <0%> (-11.12%)	6% <0%> (-1%)
...om/alibaba/dubbo/rpc/filter/ActiveLimitFilter.java	77.77% <0%> (-11.12%)	5% <0%> (-1%)
...ubbo/rpc/protocol/dubbo/ChannelWrappedInvoker.java	41.66% <0%> (-8.34%)	3% <0%> (ø)
.../dubbo/remoting/transport/netty4/NettyChannel.java	58.75% <0%> (-6.25%)	20% <0%> (-2%)
...onfig/spring/extension/SpringExtensionFactory.java	78.37% <0%> (-5.41%)	9% <0%> (ø)
...ba/dubbo/remoting/transport/netty/NettyServer.java	67.85% <0%> (-3.58%)	8% <0%> (-1%)
.../com/alibaba/dubbo/monitor/dubbo/DubboMonitor.java	87.85% <0%> (-2.81%)	15% <0%> (-1%)
...bo/remoting/transport/netty/NettyCodecAdapter.java	53.12% <0%> (-1.57%)	3% <0%> (ø)

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