Update the `portpicker` version to 1.3.1.

PiperOrigin-RevId: 272899026

Dockerfile

@@ -70,7 +70,7 @@ RUN ${PIP} install --no-cache-dir \
     matplotlib~=3.0 \
     numpy~=1.14 \
     pandas~=0.24.0 \
-    portpicker \
+    portpicker~=1.3.1 \
     six~=1.10 \
     tensorflow-model-optimization~=0.1.3 \
     tensorflow-privacy~=0.0.1 \

requirements.txt

@@ -11,7 +11,7 @@ grpcio~=1.22.0
 h5py~=2.6
 numpy~=1.14
 pandas~=0.24.0
-portpicker
+portpicker~=1.3.1
 six~=1.10
 tensorflow-model-optimization~=0.1.3
 tensorflow-privacy~=0.0.1

tensorflow_federated/tools/development/setup.py

@@ -78,7 +78,7 @@ REQUIRED_PACKAGES = [
     'grpcio~=1.22.0',
     'h5py~=2.6',
     'numpy~=1.14',
-    'portpicker',
+    'portpicker~=1.3.1',
     'six~=1.10',
     'tensorflow-model-optimization~=0.1.3',
     'tensorflow-privacy~=0.0.1',