Author: Daniel Kahn Gillmor
Description: allow compatible use of derive_builder 0.20

--- a/Cargo.toml
+++ b/Cargo.toml
@@ -40,7 +40,7 @@
 version = "1.5.0"
 
 [dependencies.derive_builder]
-version = "0.12.0"
+version = "0.20"
 
 [dependencies.half]
 version = "1.8"
