This rule was introduced in rubocop-rails 2.18.0.
Since using `response.parsed_body` is shorter than using
`JSON.parse(response.body)`, this also means we can group some lines in
one.
Metrics/LineLength: Line is too long.
RSpec/InstanceVariable: Use let instead of an instance variable.
Layout/TrailingBlankLines: Final newline missing.
Style/StringLiterals: Prefer double-quoted strings.
* Added support for GET requests
* Added support for application/graphql content-type for POST requests
* Handling query string parsing errors in controller
* Wrote specs for all this
