Update version for 2.21.0 release. (#4152)

Author: vkarampudi

tensorflow_serving/model_servers/BUILD

@@ -694,7 +694,7 @@ pkg_deb(
     homepage = "https://github.com/tensorflow/serving",
     maintainer = "TensorFlow Serving team",
     package = "tensorflow-model-server",
-    version = "undefined",  # Set when releasing a new version of TensorFlow Serving (e.g. 1.0.0).
+    version = "2.21.0",  # Set when releasing a new version of TensorFlow Serving (e.g. 1.0.0).
 )
 
 # Build with '-c opt'
@@ -705,5 +705,5 @@ pkg_deb(
     homepage = "https://github.com/tensorflow/serving",
     maintainer = "TensorFlow Serving team",
     package = "tensorflow-model-server-universal",
-    version = "undefined",  # Set when releasing a new version of TensorFlow Serving (e.g. 1.0.0).
+    version = "2.21.0",  # Set when releasing a new version of TensorFlow Serving (e.g. 1.0.0).
 )

tensorflow_serving/model_servers/version.h

@@ -22,8 +22,8 @@ limitations under the License.
 #define TF_MODELSERVER_STR_HELPER(x) #x
 #define TF_MODELSERVER_STR(x) TF_MODELSERVER_STR_HELPER(x)
 
-#define TF_MODELSERVER_MAJOR_VERSION 0
-#define TF_MODELSERVER_MINOR_VERSION 0
+#define TF_MODELSERVER_MAJOR_VERSION 2
+#define TF_MODELSERVER_MINOR_VERSION 21
 #define TF_MODELSERVER_PATCH_VERSION 0
 // TF_MODELSERVER_VERSION_SUFFIX is non-empty for pre-releases
 // (e.g. "-alpha", "-alpha.1", "-beta", "-rc", "-rc.1")

tensorflow_serving/tools/pip_package/setup.py

@@ -31,9 +31,9 @@
 DOCLINES = __doc__.split('\n')
 
 # Set when releasing a new version of TensorFlow Serving (e.g. 1.0.0).
-_VERSION = '0.0.0'
+_VERSION = '2.21.0'
 # Have this by default be open; releasing a new version will lock to TF version
-_TF_VERSION = '>=1.2.0,<3'
+_TF_VERSION = '>=2.21.0,<3'
 _TF_VERSION_SANITIZED = _TF_VERSION.replace('-', '')
 
 project_name = 'tensorflow-serving-api'