Add TextualBody-test.js

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

src/utils/pillify.js

@@ -14,6 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
+import React from "react";
 import ReactDOM from 'react-dom';
 import MatrixClientPeg from '../MatrixClientPeg';
 import SettingsStore from "../settings/SettingsStore";