Bump github.com/hashicorp/vault/api from 1.7.2 to 1.8.0 (#85)

Bumps [github.com/hashicorp/vault/api](https://github.com/hashicorp/vault) from 1.7.2 to 1.8.0.
- [Release notes](https://github.com/hashicorp/vault/releases)
- [Changelog](https://github.com/hashicorp/vault/blob/main/CHANGELOG.md)
- [Commits](https://github.com/hashicorp/vault/compare/v1.7.2...v1.8.0)

---
updated-dependencies:
- dependency-name: github.com/hashicorp/vault/api
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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go.mod

@@ -5,7 +5,7 @@ go 1.16
 require (
 	github.com/cenkalti/backoff/v3 v3.2.2 // indirect
 	github.com/hashicorp/go-retryablehttp v0.7.0 // indirect
-	github.com/hashicorp/vault/api v1.7.2
+	github.com/hashicorp/vault/api v1.8.0
 	github.com/imdario/mergo v0.3.13
 	github.com/pierrec/lz4 v2.6.1+incompatible // indirect
 	go.unistack.org/micro/v3 v3.9.11