Promote andykellr to maintainer

[djaglowski]

Also remove myself from maintainers list.

[codecov]

Codecov Report

Merging #97 (fc4754a) into main (84acca9) will increase coverage by 0.25%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main      #97      +/-   ##
==========================================
+ Coverage   75.77%   76.03%   +0.25%     
==========================================
  Files          22       22              
  Lines        1577     1577              
==========================================
+ Hits         1195     1199       +4     
+ Misses        288      285       -3     
+ Partials       94       93       -1     

Impacted Files	Coverage Δ
client/wsclient.go	86.95% <0.00%> (+2.48%)	⬆️

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[tigrannajaryan]

Thanks @djaglowski and @andykellr