feat(deps): bump singer-sdk from 0.39.1 to 0.40.0

Bumps [singer-sdk](https://github.com/meltano/sdk) from 0.39.1 to 0.40.0.
- [Release notes](https://github.com/meltano/sdk/releases)
- [Changelog](https://github.com/meltano/sdk/blob/main/CHANGELOG.md)
- [Commits](meltano/sdk@v0.39.1...v0.40.0)

---
updated-dependencies:
- dependency-name: singer-sdk
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

pyproject.toml

@@ -15,7 +15,7 @@ packages = [
 
 [tool.poetry.dependencies]
 python = ">=3.8"
-singer-sdk = { version="^0.39.0" }
+singer-sdk = { version="^0.40.0" }
 fs-s3fs = { version = "^1.1.1", optional = true }
 boto3 = "^1.34.136"
 genson = "^1.3.0"
@@ -29,7 +29,7 @@ black = "^24.4.2"
 pyupgrade = "^3.3.1"
 mypy = "^1.10.1"
 isort = "^5.11.5"
-singer-sdk = { version="^0.39.0", extras = ["testing"] }
+singer-sdk = { version="^0.40.0", extras = ["testing"] }
 moto = "^5.0.10"
 coverage = "^7.5.4"
 pydocstyle = "^6.3.0"