replace deprecated function CAS in examples

[gabrielcipriano]

replace deprecated function CAS in examples, reinforcing the use of CompareAndSwap

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• updated the changelog if the change is user-facing;
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[CLAassistant]

All committers have signed the CLA.

[codecov]

Codecov Report

Merging #138 (a6a6dbf) into master (8af810e) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #138   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           23        23           
  Lines          242       242           
=========================================
  Hits           242       242           

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