chore: release 2.2.0

[release-please]

🤖 I have created a release *beep* *boop*

2.2.0 (2021-04-12)

Features

• Added creation and mutation records to notification channels (8a42810)
• Added IstioCanonicalService for service monitoring (8a42810)
• Added support for Monitoring Query Language: https://cloud.google.com/monitoring/mql (8a42810)
• Added support for querying metrics for folders and organizations (8a42810)
• Added support for secondary aggregation when querying metrics (#471) (8a42810)
• Added support for units in the MetricService (8a42810)
• Added total_size to the response of ListAlertPolicies (8a42810)

Bug Fixes

• Extended the default deadline for UpdateGroup to 180s (8a42810)
• Un-deprecated cluster_istio for service monitoring (8a42810)

Dependencies

• update dependency com.google.cloud:google-cloud-shared-dependencies to v0.21.0 (#478) (d028912)
• update dependency com.google.protobuf:protobuf-java-util to v3.15.7 (#461) (aa17b1b)
• update dependency com.google.protobuf:protobuf-java-util to v3.15.8 (#477) (31d72d7)

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[codecov]

Codecov Report

Merging #473 (f259bef) into master (cd03955) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #473   +/-   ##
=========================================
  Coverage     77.29%   77.29%           
  Complexity      577      577           
=========================================
  Files            42       42           
  Lines          3849     3849           
  Branches         79       79           
=========================================
  Hits           2975     2975           
  Misses          777      777           
  Partials         97       97           

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[yoshi-automation]

🤖 Release is at https://github.com/googleapis/java-monitoring/releases/tag/v2.2.0 🌻

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