chore(deps): bump github.com/anthropics/anthropic-sdk-go (#490)

Bumps [github.com/anthropics/anthropic-sdk-go](https://github.com/anthropics/anthropic-sdk-go) from 1.18.1 to 1.19.0.
- [Release notes](https://github.com/anthropics/anthropic-sdk-go/releases)
- [Changelog](https://github.com/anthropics/anthropic-sdk-go/blob/main/CHANGELOG.md)
- [Commits](https://github.com/anthropics/anthropic-sdk-go/compare/v1.18.1...v1.19.0)

---
updated-dependencies:
- dependency-name: github.com/anthropics/anthropic-sdk-go
  dependency-version: 1.19.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

go.mod

@@ -5,10 +5,9 @@ go 1.24.0
 toolchain go1.24.2
 
 require (
-	github.com/anthropics/anthropic-sdk-go v1.18.1
+	github.com/anthropics/anthropic-sdk-go v1.19.0
 	github.com/fatih/color v1.18.0
 	github.com/fsnotify/fsnotify v1.9.0
-	github.com/google/go-cmp v0.7.0
 	github.com/ncruces/go-sqlite3 v0.30.1
 	github.com/spf13/cobra v1.10.1
 	github.com/spf13/viper v1.21.0
@@ -23,6 +22,7 @@ require (
 
 require (
 	github.com/go-viper/mapstructure/v2 v2.4.0 // indirect
+	github.com/google/go-cmp v0.7.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect