chore: allow releases from previous major versions (#351)

Co-authored-by: Anthonios Partheniou <[email protected]>

Author: busunkim96

packages/google-cloud-speech/.github/release-please.yml

@@ -1,2 +1,11 @@
 releaseType: python
 handleGHRelease: true
+# NOTE: this section is generated by synthtool.languages.python
+# See https://github.com/googleapis/synthtool/blob/master/synthtool/languages/python.py
+branches:
+- branch: v1
+  handleGHRelease: true
+  releaseType: python
+- branch: v0
+  handleGHRelease: true
+  releaseType: python

packages/google-cloud-speech/owlbot.py

@@ -61,6 +61,7 @@ class SpeechClient(SpeechHelpers, SpeechClient):
     templated_files, excludes=[".coveragerc"]
 )  # microgenerator has a good .coveragerc file
 
+python.configure_previous_major_version_branches()
 
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 # Samples templates