Update cw20 requirement from 1 to 2

[dependabot[bot]]

Updates the requirements on cw20 to permit the latest version.

Release notes

Sourced from cw20's releases.

v2.0.0

Attached there are some schemas and build artifacts generated at this tag. Those are for development purposes only! Please use crates.io to find the packages of this release.

Changelog

Sourced from cw20's changelog.

v2.0.0 (2024-03-26)

Full Changelog

Merged pull requests:

• Upgraded MultiTest to version 2.0.0 #903 (DariuszDepta)
• Align all crates to the 2.0.0 framework #902 (uint)

v2.0.0-rc.0 (2024-03-20)

Full Changelog

Closed issues:

• Error message on Kujira Fin #889

Merged pull requests:

• Update to 1.5 tooling #900 (uint)
• Remove CLA and references to non-Apache 2.0 licenses #898 (webmaster128)
• chore: Move 'controllers' and 'cw2' to 'cw-minus' #894 (kulikthebird)
• Update README.md #893 (kmchmk)
• Fix Cargo.lock #888 (chipshort)

v1.1.2 (2023-11-23)

Full Changelog

Merged pull requests:

• Add ensure_from_older_version #886 (chipshort)

v1.1.1 (2023-09-27)

Full Changelog

Closed issues:

• Issue in providing cw4_stake.wasm contract values for initiating #878
• Bump cw2 version #873

Merged pull requests:

• Update deps #882 (jawoznia)
• Bumped Rust version and cosmwasm-check version #881 (DariuszDepta)
• Set the resolver version to value 2 #880

... (truncated)

Commits

• 7cb79fb CHANGELOG update
• d91c70e bump version to 2.0.0
• 2dfbfb5 Merge pull request #903 from CosmWasm/mt2
• 499b01b Upgraded MultiTest to version 2.0.0
• 57491d7 Merge pull request #902 from CosmWasm/std2
• 0866d9a generate changelog for 2.0.0-rc.0
• 7651543 remove obsolete script
• bac1a98 bump cw-plus to 2.0.0-rc.0
• 1cc648d Upgraded dependencies to 2.0.0 except cw-multi-test.
• b765e62 Bumped cw-multi-test version.
• Additional commits viewable in compare view

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