chore(deps): update dependency google-cloud-video-stitcher to v0.4.0 (#100)

Author: renovate-bot

video/stitcher/requirements.txt

@@ -1,3 +1,3 @@
 google-api-python-client==2.65.0
 grpcio==1.50.0
-google-cloud-video-stitcher==0.3.2
+google-cloud-video-stitcher==0.4.0