chore(deps): update dependency @google-cloud/storage to v5.8.4

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@google-cloud/storage	5.7.2 -> 5.8.4

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Release Notes

googleapis/nodejs-storage

### [`v5.8.4`](https://togithub.com/googleapis/nodejs-storage/blob/master/CHANGELOG.md#​584-httpswwwgithubcomgoogleapisnodejs-storagecomparev583v584-2021-04-19) [Compare Source](https://togithub.com/googleapis/nodejs-storage/compare/v5.8.3...v5.8.4) ### [`v5.8.3`](https://togithub.com/googleapis/nodejs-storage/blob/master/CHANGELOG.md#​583-httpswwwgithubcomgoogleapisnodejs-storagecomparev582v583-2021-03-29) [Compare Source](https://togithub.com/googleapis/nodejs-storage/compare/v5.8.2...v5.8.3) ### [`v5.8.2`](https://togithub.com/googleapis/nodejs-storage/blob/master/CHANGELOG.md#​582-httpswwwgithubcomgoogleapisnodejs-storagecomparev581v582-2021-03-23) [Compare Source](https://togithub.com/googleapis/nodejs-storage/compare/v5.8.1...v5.8.2) ### [`v5.8.1`](https://togithub.com/googleapis/nodejs-storage/blob/master/CHANGELOG.md#​581-httpswwwgithubcomgoogleapisnodejs-storagecomparev580v581-2021-03-02) [Compare Source](https://togithub.com/googleapis/nodejs-storage/compare/v5.8.0...v5.8.1) ### [`v5.8.0`](https://togithub.com/googleapis/nodejs-storage/blob/master/CHANGELOG.md#​580-httpswwwgithubcomgoogleapisnodejs-storagecomparev574v580-2021-02-18) [Compare Source](https://togithub.com/googleapis/nodejs-storage/compare/v5.7.4...v5.8.0) ##### Features - adds support workload identity federation ([#​1404](https://www.github.com/googleapis/nodejs-storage/issues/1404)) ([7d3a3f1](https://www.github.com/googleapis/nodejs-storage/commit/7d3a3f148361e56cbcd4dc4c8fb178b75f9208bf)) ##### [5.7.4](https://www.github.com/googleapis/nodejs-storage/compare/v5.7.3...v5.7.4) (2021-02-01) ##### Bug Fixes - specified acceptable types for File.save data parameter ([#​1388](https://www.github.com/googleapis/nodejs-storage/issues/1388)) ([607f6c1](https://www.github.com/googleapis/nodejs-storage/commit/607f6c1c8b9ae5414513957f54a5de2490c454b1)) ##### [5.7.3](https://www.github.com/googleapis/nodejs-storage/compare/v5.7.2...v5.7.3) (2021-01-22) ##### Bug Fixes - retry multipart uploads on File.save() ([#​1385](https://www.github.com/googleapis/nodejs-storage/issues/1385)) ([4dec8c1](https://www.github.com/googleapis/nodejs-storage/commit/4dec8c1a362e3f80cbbf49f8bf7e7eaa2e2ce3bc)) ##### [5.7.2](https://www.github.com/googleapis/nodejs-storage/compare/v5.7.1...v5.7.2) (2021-01-11) ##### Bug Fixes - deprecated directory. prefix should be used instead ([#​1370](https://www.github.com/googleapis/nodejs-storage/issues/1370)) ([fae4c06](https://www.github.com/googleapis/nodejs-storage/commit/fae4c0635909a831d65bd3111b27250795d4735b)) ##### [5.7.1](https://www.github.com/googleapis/nodejs-storage/compare/v5.7.0...v5.7.1) (2021-01-07) ##### Bug Fixes - bump dependencies See [#​1372](https://www.github.com/googleapis/nodejs-storage/issues/1372) for details ([#​1375](https://www.github.com/googleapis/nodejs-storage/issues/1375)) ([7cf0264](https://www.github.com/googleapis/nodejs-storage/commit/7cf0264c0cea2e0d668818924aaa737381c07bfa)) ### [`v5.7.4`](https://togithub.com/googleapis/nodejs-storage/blob/master/CHANGELOG.md#​574-httpswwwgithubcomgoogleapisnodejs-storagecomparev573v574-2021-02-01) [Compare Source](https://togithub.com/googleapis/nodejs-storage/compare/v5.7.3...v5.7.4) ### [`v5.7.3`](https://togithub.com/googleapis/nodejs-storage/blob/master/CHANGELOG.md#​573-httpswwwgithubcomgoogleapisnodejs-storagecomparev572v573-2021-01-22) [Compare Source](https://togithub.com/googleapis/nodejs-storage/compare/v5.7.2...v5.7.3)

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