Release google-cloud-recaptcha_enterprise 0.6.0 (googleapis#5389)

Release google-cloud-phishing_protection 0.5.0 (googleapis#5388)

Release google-cloud-os_login 0.7.0 (googleapis#5387)

Release google-cloud-kms 1.6.0 (googleapis#5381)

Release google-cloud-data_catalog 0.1.0 (googleapis#5345)

* Initial release

Release google-cloud-vision-v1 0.1.2 (googleapis#5337)

Release google-cloud-vision-v1p3beta1 0.1.2 (googleapis#5331)

Release google-cloud-storage 1.26.0 (googleapis#4825)

#### Features

* Update V4 Signature support in Project#signed_url, Bucket#signed_url and File#signed_url
  * Add scheme, virtual_hosted_style and bucket_bound_hostname to #signed_url methods
  * Add support for V4 query param encoding and ordering
  * Convert tabs in V4 to single whitespace character
  * Set payload in V4 to X-Goog-Content-SHA256 if present
  * Fix method param default value GET for #signed_url
* Add support for V4 Signature POST Policies
  * Add Bucket#generate_signed_post_policy_v4

#### Bug Fixes

* Address keyword argument warnings in Ruby 2.7 and later

Release google-cloud-secret_manager-v1 0.2.1 (googleapis#5336)

Release google-cloud-pubsub 1.6.0 (googleapis#5315)

#### Features

* Add list_topic_snapshots and get_snapshot
  * Add PublisherClient#list_topic_snapshots
  * Add SubscriberClient#get_snapshot

#### Documentation

* Remove a spurious link in the low-level interface documentation.