Bump eris from `e6208fa` to `f919f96`

Created by: dependabot-preview[bot]

Bumps eris from e6208fa to f919f96.

Commits

• f919f96 Fix unlimited purgeChannel() behavior
• 3eace85 Fix search typings (#440)
• 809113f Fix voice receive typings (#441)
• bd48702 Fix createdAt flooring with Math.floor() (#437)
• 6c2b943 Fix editChannel() typings (#436)
• e2dc920 Add VERSION constant typings (#434)
• fde55ea Update required Node engine to 8+ (#435)
• 29b0f63 Add function to get the vanity URL of a guild (#433)
• 5254bd9 Add complete emoji and TextChannel#purge typings (#432)
• ab622ba Floor timestamp during createdAt calculation
• Additional commits viewable in compare view

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