Upgrade TypeScript to v2.3.4
Upgrade TypeScript to v2.3.4

PiperOrigin-RevId: 157667511

shakedel/tensorboard,francoisluus/tensorboard-supervise,shakedel/tensorboard,ioeric/tensorboard,tensorflow/tensorboard,tensorflow/tensorboard,agrubb/tensorboard,agrubb/tensorboard,ioeric/tensorboard,tensorflow/tensorboard,qiuminxu/tensorboard,qiuminxu/tensorboard,qiuminxu/tensorboard,shakedel/tensorboard,agrubb/tensorboard,shakedel/tensorboard,ioeric/tensorboard,agrubb/tensorboard,francoisluus/tensorboard-supervise,tensorflow/tensorboard,agrubb/tensorboard,qiuminxu/tensorboard,francoisluus/tensorboard-supervise,shakedel/tensorboard,ioeric/tensorboard,tensorflow/tensorboard,ioeric/tensorboard,agrubb/tensorboard,francoisluus/tensorboard-supervise,tensorflow/tensorboard,francoisluus/tensorboard-supervise,tensorflow/tensorboard,francoisluus/tensorboard-supervise,qiuminxu/tensorboard,qiuminxu/tensorboard,ioeric/tensorboard,shakedel/tensorboard