Bump github.com/bsv-blockchain/go-sdk from 1.2.18 to 1.2.21

Bumps [github.com/bsv-blockchain/go-sdk](https://github.com/bsv-blockchain/go-sdk) from 1.2.18 to 1.2.21.
- [Release notes](https://github.com/bsv-blockchain/go-sdk/releases)
- [Changelog](https://github.com/bsv-blockchain/go-sdk/blob/master/CHANGELOG.md)
- [Commits](bsv-blockchain/go-sdk@v1.2.18...v1.2.21)

---
updated-dependencies:
- dependency-name: github.com/bsv-blockchain/go-sdk
  dependency-version: 1.2.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

go.mod

@@ -1,14 +1,14 @@
 module github.com/bitcoinschema/go-boost
 
-go 1.24.3
+go 1.25.0
 
 require (
 	github.com/bitcoinschema/go-bob v0.5.3
 	github.com/bitcoinschema/go-bpu v0.2.3
-	github.com/bsv-blockchain/go-sdk v1.2.18
+	github.com/bsv-blockchain/go-sdk v1.2.21
 )
 
 require (
 	github.com/pkg/errors v0.9.1 // indirect
-	golang.org/x/crypto v0.47.0 // indirect
+	golang.org/x/crypto v0.48.0 // indirect
 )

go.sum

@@ -2,8 +2,8 @@ github.com/bitcoinschema/go-bob v0.5.3 h1:I9z66SSDFoarTVQj7FavqawmG2TgE/GY7mOpqb
 github.com/bitcoinschema/go-bob v0.5.3/go.mod h1:G7/Bgcw8nBKenKnNoZa3IpItwOy+qGC3rvqcH3XT1kU=
 github.com/bitcoinschema/go-bpu v0.2.3 h1:JDdWQuwBA2J9jA+x56Q3MvtEZkbDZS+VpGqaL1+cmyc=
 github.com/bitcoinschema/go-bpu v0.2.3/go.mod h1:vc8RxmsAmJ26tmQ8tMccwgbd7os8ThfO7AR5kyPdbUY=
-github.com/bsv-blockchain/go-sdk v1.2.18 h1:JFl8TNM7lf80CslrXjlungDOyuvL9COzond9BOR81Us=
-github.com/bsv-blockchain/go-sdk v1.2.18/go.mod h1:QWYwia7QSPB8+sLWyVldsIg0wPPzvEmXL5wGAT0dgaA=
+github.com/bsv-blockchain/go-sdk v1.2.21 h1:/EsUkdA3aj/7998q7Km2xW63tMO9Yox3IS5Guq9TrBk=
+github.com/bsv-blockchain/go-sdk v1.2.21/go.mod h1:5mmw1QLusuAkjWmQgUOurQYCXdIsQEsWXbAZ9zwme3g=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
@@ -12,7 +12,7 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
-golang.org/x/crypto v0.47.0 h1:V6e3FRj+n4dbpw86FJ8Fv7XVOql7TEwpHapKoMJ/GO8=
-golang.org/x/crypto v0.47.0/go.mod h1:ff3Y9VzzKbwSSEzWqJsJVBnWmRwRSHt/6Op5n9bQc4A=
+golang.org/x/crypto v0.48.0 h1:/VRzVqiRSggnhY7gNRxPauEQ5Drw9haKdM0jqfcCFts=
+golang.org/x/crypto v0.48.0/go.mod h1:r0kV5h3qnFPlQnBSrULhlsRfryS2pmewsg+XfMgkVos=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=