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

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
@google-cloud/secret-manager	dependencies	major	^1.2.1 -> ^3.0.0

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Release Notes

googleapis/nodejs-secret-manager

v3.2.0

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Features

• update secretmanager.googleapis.com v1 protos (528a1c5)

v3.1.0

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Features

• add Blunderbuss config (#​111) (312543e)
• upgrade library to GA (#​123) (aa89efa)
• secrets: begin migration to secret manager from keystore (#​125) (a4f483e)

Bug Fixes

• samples: correct usage of toString() (#​117) (e4f228e)
• handle fallback option properly (#​128) (be15ac1)
• regen protos and tests, formatting (#​115) (85539e3)
• remove eslint, update gax, fix generated protos, run the generator (#​94) (aa90072)
• synth.py clean up for multiple version (#​116) (783524d)
• update node issue template (#​130) (1ef393b)

v3.0.0

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⚠ BREAKING CHANGES

• The library now supports Node.js v10+. The last version to support Node.js v8 is tagged legacy-8 on NPM.

New feature: methods with pagination now support async iteration.

Features

• drop node8 support, support for async iterators (#​85) (24cd25b)

v2.1.0

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Features

• deferred client initialization (#​69) (237686d)

2.0.1 (2020-02-29)

Bug Fixes

• proper enum types; updated .jsdoc.js (07fa7f5)

v2.0.1

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v2.0.0

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⚠ BREAKING CHANGES

• drop support for Node 8 (which is EOL) (#​64)
• library now uses v1 API surface (#​62)

Features

• drop support for Node 8 (which is EOL) (#​64) (e4118ef)
• export protos in src/index.ts (46e2c3e)
• library now uses v1 API surface (#​62) (a8368d4)

1.2.1 (2020-02-12)

Bug Fixes

• pass x-goog-request-params header for streaming calls (0960f4c)

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