Bump sentry-raven from 3.1.1 to 3.1.2

[dependabot[bot]]

Bumps sentry-raven from 3.1.1 to 3.1.2.

Commits

• aa3327c release: 3.1.2
• f81180a Add Makefile for sentry-raven
• 9cd092e Fix version bumping script
• bf77f9e Fix sentry-raven's craft config
• 4646920 Update changelog
• 30bb9d3 Correct changelog links
• f23e980 Refine readme (#1366)
• 86dcf3c Correct type attribute's usages (#1354)
• 5337548 Merge release-sentry-rails/4.3.3 into master
• df1e5be release: 4.3.3
• Additional commits viewable in compare view

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