Update refreshable requirement from 1 to 2

[dependabot[bot]]

Updates the requirements on refreshable to permit the latest version.

Release notes

Sourced from refreshable's releases.

2.0.0

What's Changed

• Add Refreshable::try_map and swap subscribe names by @​sfackler in palantir/rust-refreshable#16

Full Changelog: https://github.com/palantir/rust-refreshable/compare/1.1.0...2.0.0

Commits

• fe02f4a Merge pull request #16 from palantir/try-map
• 28f3b0c Release 2.0.0
• ce65b2a Merge pull request #17 from palantir/excavator/policy-bot-oss
• 7eef025 Excavator: Update policy-bot config
• 2aafd5e clarify docs
• 35fd076 fix doctest
• 4535478 Add Refreshable::try_map and swap subscribe names
• d6e0d8a Merge pull request #13 from palantir/fnmut
• aeae441 Release v1.1.0
• e225475 Accept FnMut callbacks
• Additional commits viewable in compare view

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[changelog-app[bot]]

Generate changelog in changelog-dir>`changelog/@unreleased`</changelog-dir

What do the change types mean?

- `feature`: A new feature of the service. - `improvement`: An incremental improvement in the functionality or operation of the service. - `fix`: Remedies the incorrect behaviour of a component of the service in a backwards-compatible way. - `break`: Has the potential to break consumers of this service's API, inclusive of both Palantir services and external consumers of the service's API (e.g. customer-written software or integrations). - `deprecation`: Advertises the intention to remove service functionality without any change to the operation of the service itself. - `manualTask`: Requires the possibility of manual intervention (running a script, eyeballing configuration, performing database surgery, ...) at the time of upgrade for it to succeed. - `migration`: A fully automatic upgrade migration task with no engineer input required. _Note: only one type should be chosen._

How are new versions calculated?

- ❗The `break` and `manual task` changelog types will result in a major release! - 🐛 The `fix` changelog type will result in a minor release in most cases, and a patch release version for patch branches. This behaviour is configurable in autorelease. - ✨ All others will result in a minor version release.

Type

- [ ] Feature - [ ] Improvement - [ ] Fix - [ ] Break - [ ] Deprecation - [ ] Manual task - [ ] Migration

Description

Update refreshable requirement from 1 to 2 **Check the box to generate changelog(s)** - [ ] Generate changelog entry

[dependabot[bot]]

OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.