Pin version of schemars because of problems with JsonSchema derive

Author: sbernauer

Cargo.toml

@@ -20,7 +20,7 @@ lazy_static = "1.4.0"
 product-config = { git = "https://github.com/stackabletech/product-config.git", tag = "0.4.0" }
 rand = "0.8.5"
 regex = "1.5.5"
-schemars = "0.8.8"
+schemars = "=0.8.8" # https://github.com/GREsau/schemars/pull/83 (in 0.8.9) introduces problems with #derive(JsonSchema) and generics. See https://github.com/GREsau/schemars/issues/144
 serde = { version = "1.0.136", features = ["derive"] }
 serde_json = "1.0.79"
 serde_yaml = "0.8.23"