test(texttospeech): add 3.8 unit tests (via synth) (#9942)

Author: yoshi-automation

noxfile.py

@@ -86,7 +86,7 @@ def default(session):
  )
 
 
-@nox.session(python=["2.7", "3.5", "3.6", "3.7"])
+@nox.session(python=["2.7", "3.5", "3.6", "3.7", "3.8"])
 def unit(session):
  """Run the unit test suite."""
  default(session)

synth.metadata

@@ -1,19 +1,19 @@
 {
- "updateTime": "2019-11-12T13:43:15.938996Z",
+ "updateTime": "2019-12-07T13:28:50.209282Z",
  "sources": [
  {
  "generator": {
  "name": "artman",
- "version": "0.41.1",
- "dockerImage": "googleapis/artman@sha256:545c758c76c3f779037aa259023ec3d1ef2d57d2c8cd00a222cb187d63ceac5e"
+ "version": "0.42.1",
+ "dockerImage": "googleapis/artman@sha256:c773192618c608a7a0415dd95282f841f8e6bcdef7dd760a988c93b77a64bd57"
  }
  },
  {
  "git": {
  "name": "googleapis",
  "remote": "https://github.com/googleapis/googleapis.git",
- "sha": "f69562be0608904932bdcfbc5ad8b9a22d9dceb8",
- "internalRef": "279774957"
+ "sha": "a4adac3a12aca6e3a792c9c35ee850435fe7cf7e",
+ "internalRef": "284277770"
  }
  },
  {