chore: update version and README

Author: vchudnov-g

README.rst

@@ -16,16 +16,19 @@ common helpers used by all Google API clients. For more information, see the
 
 Supported Python Versions
 -------------------------
-Python >= 3.7
+Python >= 3.9
 
 
 Unsupported Python Versions
 ---------------------------
 
-Python == 2.7, Python == 3.5, Python == 3.6.
+Python == 2.7, Python == 3.5, Python == 3.6, Python == 3.7, Python == 3.8.
 
 The last version of this library compatible with Python 2.7 and 3.5 is
 `google-api-core==1.31.1`.
 
 The last version of this library compatible with Python 3.6 is
 `google-api-core==2.8.2`.
+
+The last version of this library compatible with Python 3.7 and 3.8 is
+`google-api-core==2.29.0`.

google/api_core/version.py

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "2.29.0"
+__version__ = "2.29.1"