chore(deps): update dependency google-cloud-texttospeech to v2.2.0 (#49)

Author: renovate-bot

translation/samples/snippets/hybrid_glossaries/requirements.txt

@@ -1,3 +1,3 @@
 google-cloud-translate==3.0.0
 google-cloud-vision==2.0.0
-google-cloud-texttospeech==2.1.0
+google-cloud-texttospeech==2.2.0