[chore] update viper version (#2539)

* update viper version

* removes our last uses of the slice package

* fix tests

vendor/github.com/sagikazarmark/slog-shim/handler.go

@@ -0,0 +1,45 @@
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build go1.21
+
+package slog
+
+import (
+	"log/slog"
+)
+
+// A Handler handles log records produced by a Logger..
+//
+// A typical handler may print log records to standard error,
+// or write them to a file or database, or perhaps augment them
+// with additional attributes and pass them on to another handler.
+//
+// Any of the Handler's methods may be called concurrently with itself
+// or with other methods. It is the responsibility of the Handler to
+// manage this concurrency.
+//
+// Users of the slog package should not invoke Handler methods directly.
+// They should use the methods of [Logger] instead.
+type Handler = slog.Handler
+
+// HandlerOptions are options for a TextHandler or JSONHandler.
+// A zero HandlerOptions consists entirely of default values.
+type HandlerOptions = slog.HandlerOptions
+
+// Keys for "built-in" attributes.
+const (
+	// TimeKey is the key used by the built-in handlers for the time
+	// when the log method is called. The associated Value is a [time.Time].
+	TimeKey = slog.TimeKey
+	// LevelKey is the key used by the built-in handlers for the level
+	// of the log call. The associated value is a [Level].
+	LevelKey = slog.LevelKey
+	// MessageKey is the key used by the built-in handlers for the
+	// message of the log call. The associated value is a string.
+	MessageKey = slog.MessageKey
+	// SourceKey is the key used by the built-in handlers for the source file
+	// and line of the log call. The associated value is a string.
+	SourceKey = slog.SourceKey
+)