Handle set! predicate function in queries

lib/binding_web/test/query-test.js

@@ -197,6 +197,23 @@ describe("Query", () => {
         ]
       );
     });
+
+    it('handles patterns with properties',  () => {
+      tree = parser.parse(`a(b.c);`);
+      query = JavaScript.query(`
+        ((call_expression (identifier) @func)
+         (set! foo bar)
+         (set! baz quux))
+
+        (property_identifier) @prop
+      `);
+
+      const captures = query.captures(tree.rootNode);
+      assert.deepEqual(formatCaptures(captures), [
+        {name: 'func', text: 'a', properties: {foo: 'bar', baz: 'quux'}},
+        {name: 'prop', text: 'c'},
+      ]);
+    });
   });
 });
 
@@ -208,5 +225,10 @@ function formatMatches(matches) {
 }
 
 function formatCaptures(captures) {
-  return captures.map(({name, node}) => ({ name, text: node.text }))
+  return captures.map(c => {
+    const node = c.node;
+    delete c.node;
+    c.text = node.text;
+    return c;
+  })
 }