Add JSON, YAML and TOML to the README comparison
As silly as it looks, it helps readers understand that Nickel is a viable
alternative to plain configuration languages too.
@@ -248,10 +248,13 @@ comparison with these languages.
<!-- Intentionally duplicated in `RATIONALE.md`, please update the other one for any change done here -->
| Language | Typing | Recursion | Evaluation | Side-effects |
-|----------|-------------------------------|------------|------------|---------------------------------------------------|
+|----------|-------------------------------|------------|------------|--------------------------------------------------|
| Nickel | Gradual (dynamic + static) | Yes | Lazy | Yes (constrained) |
| Starlark | Dynamic | No | Strict | No |
| Nix | Dynamic | Yes | Lazy | Predefined and specialized to package management |
| Dhall | Static (requires annotations) | Restricted | Lazy | No |
| CUE | Static (everything is a type) | No | Lazy | No, but allowed in the separated scripting layer |
| Jsonnet | Dynamic | Yes | Lazy | No |
+| JSON | None | No | Strict | No |
+| YAML | None | No | N/A | No |
+| TOML | None | No | N/A | No |
