fix(deps): update dependency @google-cloud/pubsub to v2.17.0

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@google-cloud/pubsub	2.16.1 -> 2.17.0

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Release Notes

googleapis/nodejs-pubsub

### [`v2.17.0`](https://togithub.com/googleapis/nodejs-pubsub/blob/master/CHANGELOG.md#​2170-httpswwwgithubcomgoogleapisnodejs-pubsubcomparev2166v2170-2021-08-25) [Compare Source](https://togithub.com/googleapis/nodejs-pubsub/compare/v2.16.6...v2.17.0) ##### Features - turns on self-signed JWT feature flag ([#​1382](https://www.togithub.com/googleapis/nodejs-pubsub/issues/1382)) ([e8b4922](https://www.github.com/googleapis/nodejs-pubsub/commit/e8b49228cffd8016be12ab607363136c2f27c593)) ##### Bug Fixes - **build:** move branch references to main ([#​1174](https://www.togithub.com/googleapis/nodejs-pubsub/issues/1174)) ([#​1386](https://www.togithub.com/googleapis/nodejs-pubsub/issues/1386)) ([16b710a](https://www.github.com/googleapis/nodejs-pubsub/commit/16b710aae29575b9108215479080a8d6c3dad654)) ##### [2.16.6](https://www.github.com/googleapis/nodejs-pubsub/compare/v2.16.5...v2.16.6) (2021-08-19) ##### Bug Fixes - don't require a `data` attribute to be passed when sending a message ([#​1370](https://www.togithub.com/googleapis/nodejs-pubsub/issues/1370)) ([97fd4f0](https://www.github.com/googleapis/nodejs-pubsub/commit/97fd4f041c195e0388b0613b2cf9710b89ab4e15)) ##### [2.16.5](https://www.github.com/googleapis/nodejs-pubsub/compare/v2.16.4...v2.16.5) (2021-08-18) ##### Bug Fixes - export publish and subscribe options ([#​1371](https://www.togithub.com/googleapis/nodejs-pubsub/issues/1371)) ([c37e0fd](https://www.github.com/googleapis/nodejs-pubsub/commit/c37e0fd5ee8864597241623e19ec495b5b99d5c3)) ##### [2.16.4](https://www.github.com/googleapis/nodejs-pubsub/compare/v2.16.3...v2.16.4) (2021-08-17) ##### Bug Fixes - **deps:** google-gax v2.24.1 ([#​1377](https://www.togithub.com/googleapis/nodejs-pubsub/issues/1377)) ([16a1eff](https://www.github.com/googleapis/nodejs-pubsub/commit/16a1eff34897567efa5f2116562e36325edce019)) ##### [2.16.3](https://www.github.com/googleapis/nodejs-pubsub/compare/v2.16.2...v2.16.3) (2021-08-11) ##### Bug Fixes - **pubsub:** replace IAMPolicy in API config ([#​1373](https://www.togithub.com/googleapis/nodejs-pubsub/issues/1373)) ([435a181](https://www.github.com/googleapis/nodejs-pubsub/commit/435a18110fdefb6964b331047a9ac536d758d1d3)) ##### [2.16.2](https://www.github.com/googleapis/nodejs-pubsub/compare/v2.16.1...v2.16.2) (2021-08-11) ##### Bug Fixes - **deps:** update opentelemetry monorepo to ^0.24.0 ([#​1349](https://www.togithub.com/googleapis/nodejs-pubsub/issues/1349)) ([cf0d24a](https://www.github.com/googleapis/nodejs-pubsub/commit/cf0d24a9ff090f6f3f235d8d474d75cd9599c49e)) ##### [2.16.1](https://www.github.com/googleapis/nodejs-pubsub/compare/v2.16.0...v2.16.1) (2021-07-21) ##### Bug Fixes - Updating WORKSPACE files to use the newest version of the Typescript generator. ([#​1354](https://www.togithub.com/googleapis/nodejs-pubsub/issues/1354)) ([7288e2e](https://www.github.com/googleapis/nodejs-pubsub/commit/7288e2e06b15bede3e06002a8a3dec2699312aa2)) ### [`v2.16.6`](https://togithub.com/googleapis/nodejs-pubsub/blob/master/CHANGELOG.md#​2166-httpswwwgithubcomgoogleapisnodejs-pubsubcomparev2165v2166-2021-08-19) [Compare Source](https://togithub.com/googleapis/nodejs-pubsub/compare/v2.16.5...v2.16.6) ### [`v2.16.5`](https://togithub.com/googleapis/nodejs-pubsub/blob/master/CHANGELOG.md#​2165-httpswwwgithubcomgoogleapisnodejs-pubsubcomparev2164v2165-2021-08-18) [Compare Source](https://togithub.com/googleapis/nodejs-pubsub/compare/v2.16.4...v2.16.5) ### [`v2.16.4`](https://togithub.com/googleapis/nodejs-pubsub/blob/master/CHANGELOG.md#​2164-httpswwwgithubcomgoogleapisnodejs-pubsubcomparev2163v2164-2021-08-17) [Compare Source](https://togithub.com/googleapis/nodejs-pubsub/compare/v2.16.3...v2.16.4) ### [`v2.16.3`](https://togithub.com/googleapis/nodejs-pubsub/blob/master/CHANGELOG.md#​2163-httpswwwgithubcomgoogleapisnodejs-pubsubcomparev2162v2163-2021-08-11) [Compare Source](https://togithub.com/googleapis/nodejs-pubsub/compare/v2.16.2...v2.16.3) ### [`v2.16.2`](https://togithub.com/googleapis/nodejs-pubsub/blob/master/CHANGELOG.md#​2162-httpswwwgithubcomgoogleapisnodejs-pubsubcomparev2161v2162-2021-08-11) [Compare Source](https://togithub.com/googleapis/nodejs-pubsub/compare/v2.16.1...v2.16.2)

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