tests: update callbacks test to include error rethrow scenario
tests: update callbacks test to include error rethrow scenario

JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl,JCMais/node-libcurl