Update friendly_id to 5.0.2
Add spring gem
Remove 'treat_symbols_as_metadata_keys_with_true_values' in spec_helper

it's now default behavior
Add timecop gem
Add spec for friendly_id
Add :reliable tag to spec which is highly reliable and not need to execute every time, like gems
Merge pull request #61 from kinopyo/chore/update_friendly_id

Update friendly_id