make some enums non-exhaustive (#2140)

packages/html/src/eval.rs

@@ -131,6 +131,7 @@ impl IntoFuture for UseEval {
 
 /// Represents an error when evaluating JavaScript
 #[derive(Debug)]
+#[non_exhaustive]
 pub enum EvalError {
     /// The platform does not support evaluating JavaScript.
     Unsupported,

packages/html/src/events/mounted.rs

@@ -114,6 +114,7 @@ pub type MountedResult<T> = Result<T, MountedError>;
 
 #[derive(Debug)]
 /// The error type for the MountedData
+#[non_exhaustive]
 pub enum MountedError {
     /// The renderer does not support the requested operation
     NotSupported,