update http client

[elharo]

@kolea2

[codecov]

Codecov Report

Merging #886 into master will increase coverage by 0.11%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #886      +/-   ##
============================================
+ Coverage     78.51%   78.63%   +0.11%     
- Complexity     1157     1163       +6     
============================================
  Files           203      203              
  Lines          5110     5143      +33     
  Branches        402      413      +11     
============================================
+ Hits           4012     4044      +32     
- Misses          923      925       +2     
+ Partials        175      174       -1

Impacted Files	Coverage Δ	Complexity Δ
...oogle/api/gax/httpjson/ManagedHttpJsonChannel.java	54% <0%> (-1.11%)	5% <0%> (ø)
...a/com/google/api/gax/grpc/GrpcCallableFactory.java	82.5% <0%> (-1.05%)	11% <0%> (ø)
...m/google/api/gax/httpjson/HttpJsonCallOptions.java	100% <0%> (ø)	2% <0%> (ø)	⬇️
.../google/api/gax/retrying/TimedAttemptSettings.java	100% <0%> (ø)	2% <0%> (ø)	⬇️
...m/google/api/gax/httpjson/ApiMethodDescriptor.java	100% <0%> (ø)	2% <0%> (ø)	⬇️
...api/gax/httpjson/ApiMessageHttpResponseParser.java	0% <0%> (ø)	0% <0%> (ø)	⬇️
...in/java/com/google/api/gax/rpc/BatcherFactory.java	95.12% <0%> (+0.12%)	9% <0%> (+2%)	⬆️
.../java/com/google/api/gax/grpc/GrpcClientCalls.java	95.65% <0%> (+0.19%)	7% <0%> (ø)	⬇️
.../java/com/google/api/gax/grpc/CallOptionsUtil.java	95.45% <0%> (+0.21%)	6% <0%> (ø)	⬇️
...httpjson/InstantiatingHttpJsonChannelProvider.java	70.96% <0%> (+0.47%)	19% <0%> (ø)	⬇️
... and 16 more

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