Update config.
Update config.

Addresses deprecation issues discovered in
https://circleci.com/gh/aha-app/aha-public/1273:

```sh
bundle exec rubocop
Warning: unrecognized cop Capybara/CurrentPathExpectation found in
.rubocop_todo.yml
Warning: unrecognized cop RSpec/ContextWording found in
.rubocop_todo.yml
.rubocop-https---raw-githubusercontent-com-aha-app-rubocop-aha-master-lib-config-yml:
Lint/BlockAlignment has the wrong namespace - should be Layout
.rubocop-https---raw-githubusercontent-com-aha-app-rubocop-aha-master-lib-config-yml:
Lint/DefEndAlignment has the wrong namespace - should be Layout
.rubocop-https---raw-githubusercontent-com-aha-app-rubocop-aha-master-lib-config-yml:
Lint/EndAlignment has the wrong namespace - should be Layout
Error: The `Style/TrailingCommaInLiteral` cop no longer exists. Please
use `Style/TrailingCommaInArrayLiteral` and/or
`Style/TrailingCommaInHashLiteral` instead.
(obsolete configuration found in
.rubocop-https---raw-githubusercontent-com-aha-app-rubocop-aha-master-lib-config-yml,
please update it)
Exited with code 2
```

aha-app/rubocop-aha