Bumped version to 0.3.0.dev0

Created by: stefanoborini

Post-release branch for 0.3.0.dev0

Created by: codecov-io

Codecov Report

Merging #178 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #178   +/-   ##
=======================================
  Coverage   93.83%   93.83%           
=======================================
  Files          43       43           
  Lines        1038     1038           
  Branches       81       81           
=======================================
  Hits          974      974           
  Misses         60       60           
  Partials        4        4

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