Updated to Rubocop 0.44.
Updated to Rubocop 0.44.

- Disabled the `Style/SafeNavigation` cop since it makes it too
  convenient to hide nil values.
- Defaulted the `Metrics/BlockLength` cop to 25 lines for a block and
  excluded RSpec and gemspec files since it's fairly common to have
  gemspecs and spec that run more than 25 lines in length. This seems
  like reasonable exceptions for now.
- Configured the `Style/VariableNumber` cop so that snake case is
  always used (i.e. `example_1`).

bkuhlmann/rails_slim_template,bkuhlmann/rails_slim_template,bkuhlmann/rails_slim_template