chore(deps): update dependency google-cloud-texttospeech to v1 [(#3210)](#3210)

Co-authored-by: gcf-merge-on-green[bot] <60162190+gcf-merge-on-green[bot]@users.noreply.github.com>

Author: 2 people

texttospeech/snippets/requirements.txt

@@ -1,2 +1,2 @@
 future==0.18.2
-google-cloud-texttospeech==0.5.0
+google-cloud-texttospeech==1.0.1