Description

This PR bumps Cosmos SDK to v0.45.4 and adds CosmWASM support

Checklist

• [ ] Targeted PR against correct branch.
• [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• [ ] Wrote unit tests.
• [ ] Run dartfmt.
• [ ] Run dartanalyzer
• [ ] Updated the documentation.
• [ ] Added an entry to the CHANGELOG.md file.
• [ ] Re-reviewed Files changed in the Github PR explorer.