parser: improve error recovery (#557)

also fill out the AST more

Author: sbdchd

crates/squawk_linter/src/rules/prefer_timestamptz.rs

@@ -32,10 +32,8 @@ pub fn is_not_allowed_timestamp(ty: &ast::Type) -> bool {
         ast::Type::BitType(_) => false,
         ast::Type::DoubleType(_) => false,
         ast::Type::TimeType(time_type) => {
-            if let Some(ty_name) = time_type.name_ref() {
-                if ty_name.text() == "timestamp" && time_type.with_timezone().is_none() {
-                    return true;
-                }
+            if time_type.timestamp_token().is_some() && time_type.with_timezone().is_none() {
+                return true;
             }
             false
         }