Method useColour

tests/catch.hpp:7869–7869

    unsigned int Config::rngSeed() const               { return m_data.rngSeed; }
    int Config::benchmarkResolutionMultiple() const    { return m_data.benchmarkResolutionMultiple; }
    UseColour::YesOrNo Config::useColour() const       { return m_data.useColour; }
    bool Config::shouldDebugBreak() const              { return m_data.shouldDebugBreak; }
    int Config::abortAfter() const                     { return m_data.abortAfter; }
    bool Config::showInvisibles() const                { return m_data.showInvisibles; }