Add lifetimes to GlobalRuntimeState and EvalState for future needs.

src/api/custom_syntax.rs

@@ -151,7 +151,7 @@ impl Deref for Expression<'_> {
     }
 }
 
-impl EvalContext<'_, '_, '_, '_, '_, '_, '_, '_> {
+impl EvalContext<'_, '_, '_, '_, '_, '_, '_, '_, '_, '_> {
     /// Evaluate an [expression tree][Expression].
     ///
     /// # WARNING - Low Level API