avoid warnings about illegal reflective access

[alexanderkjall]

Upgrades the netty dependency, all tests are green for me locally, there is still a warning about the same thing from guice and it seems like guice haven't released a fixed version yet, there is an open bug about it here: google/guice#1133

bug reference: #1037

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This change is 

[codecov-io]

Codecov Report

Merging #1038 into master will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #1038      +/-   ##
==========================================
+ Coverage   59.31%   59.34%   +0.03%     
==========================================
  Files         441      441              
  Lines        8686     8686              
  Branches      528      528              
==========================================
+ Hits         5152     5155       +3     
+ Misses       3244     3243       -1     
+ Partials      290      288       -2

Impacted Files	Coverage Δ
...va/org/apache/http/impl/io/ChunkedInputStream.java	60.95% <0%> (+0.95%)	⬆️
...ava/netty/handler/FramedResponseStreamHandler.java	84.48% <0%> (+3.44%)	⬆️

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