Update dependency @google-cloud/text-to-speech to ^0.4.0 (#1020)
Update dependency @google-cloud/text-to-speech to ^0.4.0 (#1020)


GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples,GoogleCloudPlatform/nodejs-docs-samples