Handle more exceptions, wrap runtime_error in DublinTracerouteException

[insomniacslk]

Fixes #10

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 15.20%. Comparing base (94d98ef) to head (959200a).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #24   +/-   ##
=======================================
  Coverage   15.20%   15.20%           
=======================================
  Files           4        4           
  Lines         250      250           
=======================================
  Hits           38       38           
  Misses        212      212           

Flag	Coverage Δ
unittests	15.20% <ø> (ø)

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