Bump sentry-raven from 3.1.1 to 3.1.2

Bumps [sentry-raven](https://github.com/getsentry/raven-ruby) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/getsentry/raven-ruby/releases)
- [Commits](getsentry/sentry-ruby@3.1.1...sentry-raven-v3.1.2)

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

Gemfile.lock

@@ -495,7 +495,7 @@ GEM
       childprocess (>= 0.5, < 4.0)
       rubyzip (>= 1.2.2)
     semantic_range (2.3.1)
-    sentry-raven (3.1.1)
+    sentry-raven (3.1.2)
       faraday (>= 1.0)
     sidekiq (5.2.9)
       connection_pool (~> 2.2, >= 2.2.2)