Bump mongodb from 3.1.9 to 3.3.4

[dependabot-preview]

Bumps mongodb from 3.1.9 to 3.3.4.

Release notes

Sourced from mongodb's releases.

v3.3.4

The MongoDB Node.js team is pleased to announce version 3.3.4 of the driver

Release Highlights

This release primary consists of improvements to the "unified topology". In particular, a regression with interaction between the connection pool and topology could result in servers which "go away" (due to network error, for example) would not return, resulting in a MongoTimeoutError.

Release Notes

Bug

• [NODE-2123] - MaxListenersExceededWarning caused by topologyDescriptionChanged
• [NODE-2214] - Incorrect removal of Unknown server type from ReplicaSetNoPrimary topology
• [NODE-2234] - isConnected() takes legacy path with useUnifiedTopology
• [NODE-2251] - `useUnifiedTopology` continuously emits &[Bump mocha from 5.2.0 to 7.0.1 #39](https://github-redirect.dependabot.com/mongodb/node-mongodb-native/issues/39);close&[Bump mocha from 5.2.0 to 7.0.1 #39](https://github-redirect.dependabot.com/mongodb/node-mongodb-native/issues/39); event when replica set member is down
• [NODE-2268] - Legacy SDAM ReplSet topology reports incorrect topology ID
• [NODE-2270] - Servers are not removed from unknownServer list, leaking
• [NODE-2274] - Unified topology never regains nodes which temporarily go down
• [NODE-2277] - Unhandled error when server is offline

Improvement

• [NODE-1517] - normalize state management across all stateful types
• [NODE-2257] - Introduce ServerDescription equality to reduce SDAM events
• [NODE-2263] - support ability to pass hint to update
• [NODE-2276] - Add SDAM test for debouncing topology description updates
• [NODE-2280] - Integrate a state machine into the unified topology
• [NODE-2309] - Document the design and rationale of the unified topology
• [NODE-2316] - Correct client metadata for unified topology

v3.3.0

The MongoDB Node.js team is pleased to announce version 3.3.0 of the driver

... (truncated)

Commits

• ce60476 chore(release): 3.3.4
• d126665 fix(topology): report unified topology as nodejs
• 0a22e3f test: allow values other than true for unified filter
• d38a6b6 refactor(topology): always ensure useUnifiedTopology is present
• 7dc7cb8 test: support only passing options to configuration.newTopology
• 5f6a787 fix(connect): prevent multiple callbacks in error scenarios
• ba123a6 refactor: support a factory type in connect
• 51e8807 doc: introduce documentation about the unified topology design
• 0c1114d refactor(topology): report topology state for helper methods
• b493e1b chore(release): 3.3.4-rc0
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #31.