Add dot binary op expression parsing

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

src/syn/parser.rs

@@ -171,6 +171,12 @@ impl<'t> Parser<'t> {
     bin_expr!(
         next_bin_mul_expr,
         &[TokenKind::FSlash, TokenKind::Splat],
+        next_dot_expr
+    );
+    // .
+    bin_expr!(
+        next_dot_expr,
+        &[TokenKind::Dot],
         next_un_expr
     );
 
@@ -845,6 +851,20 @@ mod test {
                 )
             )
         );
+
+        test_parser!(
+            Parser::try_from("foo.bar().baz(qux)").unwrap(),
+            next_expr,
+            bin_expr(
+                base_expr(BaseExprKind::Ident),
+                BinOp::Dot,
+                bin_expr(
+                    fun_call_expr(base_expr(BaseExprKind::Ident), vec![]),
+                    BinOp::Dot,
+                    fun_call_expr(base_expr(BaseExprKind::Ident), vec![base_expr(BaseExprKind::Ident)]),
+                )
+            )
+        );
     }
 
     #[test]