message: Use "property" instead of "attribute"
  Be consistent with source code language in tests.
diff: @@ -212,22 +212,22 @@ console.log("How are you doing?");`;
  );
  });
  - it(`should read the whole object when cursor is on its attribute`, async () => {
  + it(`should read the whole object when cursor is on its property`, async () => {
  const extractableCode = '{ foo: "bar", one: true }';
  const code = `console.log(${extractableCode});`;
  - const selectionOnAttribute = new Selection([0, 16], [0, 16]);
  + const selectionOnProperty = new Selection([0, 16], [0, 16]);
  - await doExtractVariable(code, selectionOnAttribute, extractableCode);
  + await doExtractVariable(code, selectionOnProperty, extractableCode);
  expect(editor.read).toBeCalledWith(selectionFor([0, 12], extractableCode));
  });
  - it(`should read the nested object when cursor is on its attribute`, async () => {
  + it(`should read the nested object when cursor is on nested object property`, async () => {
  const extractableCode = "{ bar: true }";
  const code = `console.log({ foo: ${extractableCode} });`;
  - const selectionOnAttribute = new Selection([0, 21], [0, 21]);
  + const selectionOnNestedProperty = new Selection([0, 21], [0, 21]);
  - await doExtractVariable(code, selectionOnAttribute, extractableCode);
  + await doExtractVariable(code, selectionOnNestedProperty, extractableCode);
  expect(editor.read).toBeCalledWith(selectionFor([0, 19], extractableCode));
  });
  