To bump the version number, change it in these places:
CMakeLists.txt
project(frobby VERSION 0.9.5 LANGUAGES CXX)
doc/doxygen.conf
PROJECT_NUMBER = 0.9.5
src/frobby.h
const char* const version = "0.9.5";
test/messages/help-noparam.err
Frobby version 0.9.5 Copyright (C) 2007 Bjarke Hammersholt Roune