chore(deps): update module spf13/viper to v1.7.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/spf13/viper	require	minor	v1.4.0 -> v1.7.1

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Release Notes

spf13/viper

### [`v1.7.1`](https://togithub.com/spf13/viper/releases/v1.7.1) [Compare Source](https://togithub.com/spf13/viper/compare/v1.7.0...v1.7.1) This release contains a bugfix for environment variable expansion. See [#​495](https://togithub.com/spf13/viper/issues/495) and [#​940](https://togithub.com/spf13/viper/issues/940) for details. ### [`v1.7.0`](https://togithub.com/spf13/viper/releases/v1.7.0) [Compare Source](https://togithub.com/spf13/viper/compare/v1.6.3...v1.7.0) This release mostly contains bug and security fixes, but there are a few new features as well: - The unmaintained [github.com/xordataexchange/crypt](github.com/xordataexchange/crypt) has been replaced with [github.com/bketelsen/crypt](github.com/bketelsen/crypt) - Added firestore support as a remote config source (thanks [@​alxmsl](https://togithub.com/alxmsl)) ### [`v1.6.3`](https://togithub.com/spf13/viper/releases/v1.6.3) [Compare Source](https://togithub.com/spf13/viper/compare/v1.6.2...v1.6.3) Fixes uninstallable library on clean GOPATH ### [`v1.6.2`](https://togithub.com/spf13/viper/releases/v1.6.2) [Compare Source](https://togithub.com/spf13/viper/compare/v1.6.1...v1.6.2) This is a patch release fixing a(n edge case) bug introduced in v1.6.0 See [#​818](https://togithub.com/spf13/viper/issues/818) and [#​827](https://togithub.com/spf13/viper/issues/827) for details ### [`v1.6.1`](https://togithub.com/spf13/viper/releases/v1.6.1) [Compare Source](https://togithub.com/spf13/viper/compare/v1.6.0...v1.6.1) This is a patch release fixing a bug introduced in v1.6.0 ### [`v1.6.0`](https://togithub.com/spf13/viper/releases/v1.6.0) [Compare Source](https://togithub.com/spf13/viper/compare/v1.5.0...v1.6.0) #### Changes ##### Added - Global `UnmarshalExact` method - `StringReplacer` interface for custom environment key replacing logic - GolangCI Lint - INI support - Key delimiter made configurable - Support for config files without extensions ##### Changed - Moved to GitHub actions build from Travis ##### Fixed - `IsSet` no longer returns true when an unset key has a flags bound - `SafeWriteConfigAs` works as expected **Happy Holidays!** ### [`v1.5.0`](https://togithub.com/spf13/viper/releases/v1.5.0) [Compare Source](https://togithub.com/spf13/viper/compare/v1.4.0...v1.5.0) Documentation and other fixes

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