Bump rollbar from 2.27.0 to 3.0.0

Bumps [rollbar](https://github.com/rollbar/rollbar-gem) from 2.27.0 to 3.0.0.
- [Release notes](https://github.com/rollbar/rollbar-gem/releases)
- [Changelog](https://github.com/rollbar/rollbar-gem/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rollbar/rollbar-gem/compare/v2.27.0...v3.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Gemfile

@@ -49,7 +49,7 @@ gem "recipient_interceptor", "~> 0.2.0"
 gem "redcarpet", "~> 3.4.0"
 gem "responders", "~> 2.4.0"
 gem "rinku", "~> 2.0.6", require: "rails_rinku"
-gem "rollbar", "~> 2.27.0"
+gem "rollbar", "~> 3.0.0"
 gem "sassc-rails", "~> 2.1.2"
 gem "savon", "~> 2.12.0"
 gem "sitemap_generator", "~> 6.1.2"