Bump raven from 6.6.0 to 6.9.0

[dependabot-preview]

Bumps raven from 6.6.0 to 6.9.0.

Release notes

Sourced from raven's releases.

6.8.0 (2018-05-12)

• [Core] Fixed DSNs without secrets not sending events.
• [Core] Added lazy import for pkg_resources
• [Core] Added NamedTuple Serializer
• [Sanic] Fixed sanic integration dependencies
• [Django] Fixed sql hook bug

6.7.0 (2018-04-18)

• [Sanic] Added support for sanic.
• [Core] Disabled dill logger by default
• [Core] Added SENTRY_NAME, SENTRY_ENVIRONMENT and SENTRY_RELEASE
  environment variables
• [Core] DSN secret is now optional
• [Core] Added fix for cases with exceptions in repr
• [core] Fixed bug with mutating record.data

Changelog

Sourced from raven's changelog.

6.9.0 (2018-05-30)

• [Core] Switched from culprit to transaction for automatic transaction reporting.
• [CI] Removed py3.3 from build
• [Django] resolved an issue where the log integration would override the user.

6.8.0 (2018-05-12)

• [Core] Fixed DSNs without secrets not sending events.
• [Core] Added lazy import for pkg_resources
• [Core] Added NamedTuple Serializer
• [Sanic] Fixed sanic integration dependencies
• [Django] Fixed sql hook bug

6.7.0 (2018-04-18)

• [Sanic] Added support for sanic.
• [Core] Disabled dill logger by default
• [Core] Added SENTRY_NAME, SENTRY_ENVIRONMENT and SENTRY_RELEASE
  environment variables
• [Core] DSN secret is now optional
• [Core] Added fix for cases with exceptions in repr
• [core] Fixed bug with mutating record.data

Commits

• 4b53443 Release: 6.9.0.dev0 → 6.9.0
• 906445e doc: update changelog
• 826a267 fix: Keep user in log data if it came from django (#1246)
• 54a6a5f Fix flake8 error
• 640c1f8 Wrap getpwid in exception fixes:#1242
• df48707 Remove deploy stage for now
• 030d2b6 Update travis and Changelog
• 3b13b67 Release: 6.8.0 → 6.9.0.dev0
• d240cf8 [FIX] TypeError on LambdaClient(transport=...)
• fb52fa5 Remove py3.3 from ci build
• Additional commits viewable in compare view

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[coveralls]

Coverage remained the same at 74.635% when pulling a137c51 on dependabot/pip/raven-6.9.0 into 15d780e on master.