Handle is?, is-not?, and set! predicate functions in queries

lib/binding_web/test/query-test.js

@@ -202,16 +202,18 @@ describe("Query", () => {
       tree = parser.parse(`a(b.c);`);
       query = JavaScript.query(`
         ((call_expression (identifier) @func)
-         (set! foo bar)
-         (set! baz quux))
+         (set! foo)
+         (set! bar baz))
 
-        (property_identifier) @prop
+        ((property_identifier) @prop
+         (is? foo)
+         (is-not? bar baz))
       `);
 
       const captures = query.captures(tree.rootNode);
       assert.deepEqual(formatCaptures(captures), [
-        {name: 'func', text: 'a', properties: {foo: 'bar', baz: 'quux'}},
-        {name: 'prop', text: 'c'},
+        {name: 'func', text: 'a', setProperties: {foo: null, bar: 'baz'}},
+        {name: 'prop', text: 'c', assertedProperties: {foo: null}, refutedProperties: {bar: 'baz'}},
       ]);
     });
   });