Add missing node types (#282)

This PR adds a few missing NodeTypes for the node AST.

Author: ferranbt

crates/artifacts/solc/src/ast/lowfidelity.rs

@@ -202,6 +202,9 @@ pub enum NodeType {
     ParameterList,
     TryCatchClause,
     ModifierInvocation,
+    UserDefinedTypeName,
+    ArrayTypeName,
+    Mapping,
 
     /// An unknown AST node type.
     Other(String),