support scala 3 build for util-security

[pjfanning]

relates to #274

[codecov-commenter]

Codecov Report

Merging #302 (6e0e10f) into develop (9f15cce) will increase coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop     #302      +/-   ##
===========================================
+ Coverage    49.29%   49.31%   +0.01%     
===========================================
  Files          322      322              
  Lines        18523    18523              
  Branches      1055     1055              
===========================================
+ Hits          9131     9134       +3     
+ Misses        9392     9389       -3     

Impacted Files	Coverage Δ
...er/util/security/X509CertificateDeserializer.scala	100.00% <ø> (ø)
util-core/src/main/scala/com/twitter/io/Buf.scala	93.27% <0.00%> (ø)
...ore/src/main/scala/com/twitter/util/Duration.scala	85.39% <0.00%> (+0.56%)	⬆️
...in/scala/com/twitter/logging/QueueingHandler.scala	100.00% <0.00%> (+6.25%)	⬆️

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[jyanJing]

Hi @pjfanning , the change is landed: 47b7acd, thank you for your contribution!