Upgrade TensorFlow to 2.3.1 (#122)

Author: saudet

tensorflow-core/tensorflow-core-api/WORKSPACE

@@ -16,10 +16,10 @@ http_archive(
     patch_args = ["-p1"],
     patch_cmds = ["grep -rl 'java_package' tensorflow/core | xargs sed -i.bak 's/^\(.* java_package = \"org\.tensorflow\.\)\(.*\"\)/\\1proto.\\2'/"],
     urls = [
-       "https://github.com/tensorflow/tensorflow/archive/v2.3.0.tar.gz",
+       "https://github.com/tensorflow/tensorflow/archive/v2.3.1.tar.gz",
     ],
-    sha256 = "2595a5c401521f20a2734c4e5d54120996f8391f00bb62a57267d930bce95350",
-    strip_prefix = "tensorflow-2.3.0"
+    sha256 = "ee534dd31a811f7a759453567257d1e643f216d8d55a25c32d2fbfff8153a1ac",
+    strip_prefix = "tensorflow-2.3.1"
 )
 
 # START: Upstream TensorFlow dependencies