Add boxed_union proptest-derive feature

Our Op enum grew large enough to trigger a stack overflow in
proptest-derive's generated code. Thankfully, this feature works around
the problem.

1 files changed, 1 insertions, 1 deletions

diff --git a/Cargo.toml b/Cargo.toml
index 5ae38d7d..afd67a21 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -109,7 +109,7 @@ features = [
 approx = "0.5.1"
 k9.workspace = true
 proptest = "1.5.0"
-proptest-derive = "0.5.0"
+proptest-derive = { version = "0.5.0", features = ["boxed_union"] }
 xshell = "0.2.6"
 
 [features]