Add parsing of dot operator

Signed-off-by: Marcel Müller <neikos@neikos.email>

src/parser/mod.rs

@@ -710,6 +710,7 @@ fn parse_expression<'input>(
                 Left GreaterOrEqual => 15,
                 Left Lesser => 15,
                 Left LesserOrEqual => 15,
+                Left Dot => 23,
             ]
         }).postfix(dispatch! { surrounded(ws, parse_operator);
             TokenOperator::QuestionMark => Postfix(22, |input, rhs| {
@@ -1071,4 +1072,15 @@ mod tests {
 
         insta::assert_debug_snapshot!(ast);
     }
+
+    #[test]
+    fn check_access_operator() {
+        let input = "{{= foo?.bar }}";
+
+        let parsed = crate::lexer::parse(input.into()).unwrap();
+
+        let ast = panic_pretty(input, parse(parsed.tokens()));
+
+        insta::assert_debug_snapshot!(ast);
+    }
 }