Update derive_builder requirement from 0.9.0 to 0.12.0

Updates the requirements on [derive_builder](https://github.com/colin-kiegel/rust-derive-builder) to permit the latest version.
- [Release notes](https://github.com/colin-kiegel/rust-derive-builder/releases)
- [Commits](https://github.com/colin-kiegel/rust-derive-builder/compare/v0.9.0...v0.12.0)

---
updated-dependencies:
- dependency-name: derive_builder
  dependency-type: direct:production
...

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

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 503030b..baec46e 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -24,7 +24,7 @@ serde_derive   = "1"
 serde_json     = "1"
 uuid           = { version = "0.8", features = ["serde", "v4"] }
 log            = "0.4"
-derive_builder = "0.9.0"
+derive_builder = "0.12.0"
 failure        = "0.1"
 
 [dev-dependencies]