build(deps): bump mongodb from 2.3.1 to 2.7.1

[dependabot]

Bumps mongodb from 2.3.1 to 2.7.1.

Release notes

Sourced from mongodb's releases.

v2.7.1

The MongoDB Rust driver team is pleased to announce the v2.7.1 release of the mongodb crate, now available for download from crates.io.

This release fixes a bug that caused a memory leak in various circumstances.

Full Release Notes

Bugfixes

• RUST-1779 Fix a memory leak in cleanup tracking (#979)

v2.7.0

The MongoDB Rust driver team is pleased to announce the v2.7.0 release of the mongodb crate, now available for download from crates.io.

The Rust driver documentation is now hosted at https://www.mongodb.com/docs/drivers/rust/current/. This documentation includes detailed content about features, runnable examples, troubleshooting resources, and more.

Highlighted Changes

Serialization Behavior Change

When serializing values via serde, the serializer can indicate whether or not the target format is human-readable, allowing types to change behavior based on that. The Rust driver had inadvertently been serializing values given to find_one_and_replace and replace_one as human-readible when all other methods serialize as non-human-readible; this bug is fixed in 2.7.0, with those methods also serializing as non-human-readible.

However, it is potentially possible (if unlikely) that user code may rely on this bug. If your code does rely on human-readable serialization, you can specify that via the new human_readable_serialization field in CollectionOptions.

run_cursor_command

The Rust driver provides the run_command method as a way for users to directly send bson commands to the server; this is particularly useful when the driver does not yet have support for a newly-added server command. However, using this with commands that return a cursor requires re-implementing the logic for cursor iteration, which can be tedious and error-prone. The new run_cursor_command method avoids those problems, directly returning a Cursor using the same iteration logic as other methods.

SDAM Logging

The Rust driver will now log SDAM events when using the tracing-unstable feature.

Client Management

The Client type now provides three additional ways to shape behavior to fit your workload:

• ClientOptions.max_connecting lets you specify how many "in flight" connections can be established in parallel. This was previously fixed at 2 and defaults to the same value.
• Client::warm_connection_pool will create new connections to bring the connection pool up to min_pool_size, which can provide more predictable performance in some circumstances.
• Client::shutdown will cleanly stop background tasks and wait for outstanding handles to be dropped. This is particularly useful when using event handlers that reference external resources, as otherwise those handlers may be invoked in a background task even after the Client has been dropped.

Included Changes

Below are a selected list of changes with user impact; for a full list of changes see this GitHub query.

New Features

• RUST-1420 Cache AWS credentials received from endpoints (#905)
• RUST-1604 Add custom bucketing fields to timeseries options (#907)
• RUST-1588: Add RunCursorCommand (#912)
• RUST-802 Support Unix Domain Sockets (#908) (thanks @​PureWhiteWu!)
• RUST-1509 SDAM Logging (#918)
• RUST-1608 Clean shutdown for Client (#920)

... (truncated)

Commits

• 7b4e676 release v2.7.1
• 5af63c3 RUST-1779 Fix a memory leak in cleanup tracking (#979) (#984)
• 0babc83 release v2.7.0 (#962)
• 1c36dab minor: pin async-executor (#964) (#965)
• 636de62 release v2.7.0-beta.1 (#956)
• 92b984e minor: fix deprecation warnings (#960) (#961)
• f59cef2 RUST-1763 deprecate CollectionOptions::human_readable_serialization (#957) (#...
• a8972b9 fixing the find or delete serde inconsistency (#948) (#955)
• b8446b2 RUST-1757 Fix final cursor batch handling (#951) (#954)
• 640a30a RUST-1746 Use more environment variables in Azure KMS test (#944)
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)