Add missing `Dockerfile` and `setup.py` dependencies.

PiperOrigin-RevId: 270169723

Dockerfile

@@ -73,5 +73,6 @@ RUN ${PIP} --no-cache-dir install \
     tensorflow-model-optimization~=0.1.3 \
     tensorflow-privacy~=0.0.1 \
     tf-estimator-nightly==1.14.0.dev2019091601 \
-    tf-nightly
+    tf-nightly \
+    typing~=3.7.0
 RUN pip freeze

tensorflow_federated/tools/development/setup.py

@@ -69,8 +69,10 @@ with open('tensorflow_federated/version.py') as fp:
   VERSION = globals_dict['__version__']
 
 REQUIRED_PACKAGES = [
+    'absl-py~=0.7',
     'attrs~=18.2',
     'cachetools~=3.1.1',
+    'enum34~=1.1',
     'grpcio~=1.22.0',
     'h5py~=2.6',
     'numpy~=1.14',