Rakefile : add 'inch' task to the default run
Rakefile : add 'inch' task to the default run

This will check the inline documentation each time the CI runs
or 'rake' is run locally.

Signed-off-by: Grant Ramsay <4ab1b2fdb7784a8f9b55e81e3261617f44fd0585@gmail.com>

seapagan/optioneer,seapagan/optioneer