fix(deps): update dependency @google-cloud/pubsub to v3

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@google-cloud/pubsub	^2.0.0 -> ^3.0.0

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Release Notes

googleapis/nodejs-pubsub

v3.0.1

Compare Source

Bug Fixes

• deps: update dependency @​google-cloud/paginator to v4 (#​1565) (461b58b)
• detect subscription properties and warn for exactly-once (#​1561) (98cf540)

v3.0.0

Compare Source

⚠ BREAKING CHANGES

• update library to use Node 12 (#​1564)

Features

• add BigQuery configuration for subscriptions (#​1563) (29d38a1)

Bug Fixes

• deps: update dependency google-gax to v2.30.4 (#​1555) (518fce1)
• fixes for dynamic routing and streaming descriptors (#​1566) (158c606)

Build System

• update library to use Node 12 (#​1564) (adb4319)

2.19.4 (2022-05-05)

Bug Fixes

• deps: update dependency google-gax to v2.30.3 (#​1549) (5810331)

2.19.3 (2022-04-26)

Bug Fixes

• deps: update dependency google-gax to v2.30.2 (#​1502) (37d075e)

2.19.2 (2022-04-21)

Bug Fixes

• fix flaky schema and subscription tests (#​1518) (5ff0105)

2.19.1 (2022-04-06)

Bug Fixes

• deps: update dependency google-gax to v2.29.7 (#​1493) (c8921a7)
• deps: update dependency google-gax to v2.30.0 (#​1496) (073a1b8)
• update grpc.max_metadata_size to 4MiB for exactly-once, and shift ack/modack errors to 'debug' stream channel (#​1505) (abd10cc)

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