Update strum requirement from 0.25 to 0.26

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

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

Cargo.toml

@@ -24,7 +24,7 @@ itertools = "0.11"
 serde = { features = ["derive"], version = "1" }
 serde_json = "1"
 smart-default = "0.7"
-strum = { features = ["derive"], version = "0.25" }
+strum = { features = ["derive"], version = "0.26" }