Upgrade go-msgpack to v2 2.1.1

This adds the option to specify what version of the `time.Time` encoding
format is desired. The default option is false, which preserves
compatibility with the current dependency of
`hashicorp/go-msgpack 0.5.5` in go.mod, but users of this library will
probably want to override the the setting.

While we're here, upgrade the go.mod file.

I tested that this appears to work with Nomad.

This needs to be updated and merged after
hashicorp/raft#577

Author: Christopher Swenson

v2/bolt_store.go

@@ -6,7 +6,7 @@ import (
 	"os"
 	"time"
 
-	metrics "github.com/armon/go-metrics"
+	"github.com/armon/go-metrics"
 	v1 "github.com/boltdb/bolt"
 	"github.com/hashicorp/raft"
 	"go.etcd.io/bbolt"
@@ -36,6 +36,8 @@ type BoltStore struct {
 
 	// The path to the Bolt database file
 	path string
+
+	msgpackUseNewTimeFormat bool
 }
 
 // Options contains all the configuration used to open the Bbolt
@@ -51,6 +53,12 @@ type Options struct {
 	// write to the log. This is unsafe, so it should be used
 	// with caution.
 	NoSync bool
+
+	// MsgpackUseNewTimeFormat is used to force the underlying msgpack codec to
+	// use the newer format of time.Time when encoding, used in versions <=0.5.5
+	// by default. Decoding is not affected, as all decoders know how to decode
+	// both formats.
+	MsgpackUseNewTimeFormat bool
 }
 
 // readOnly returns true if the contained bolt options say to open
@@ -76,8 +84,9 @@ func New(options Options) (*BoltStore, error) {
 
 	// Create the new store
 	store := &BoltStore{
-		conn: handle,
-		path: options.Path,
+		conn:                    handle,
+		path:                    options.Path,
+		msgpackUseNewTimeFormat: options.MsgpackUseNewTimeFormat,
 	}
 
 	// If the store was opened read-only, don't try and create buckets
@@ -188,7 +197,7 @@ func (b *BoltStore) StoreLogs(logs []*raft.Log) error {
 	batchSize := 0
 	for _, log := range logs {
 		key := uint64ToBytes(log.Index)
-		val, err := encodeMsgPack(log)
+		val, err := encodeMsgPack(log, b.msgpackUseNewTimeFormat)
 		if err != nil {
 			return err
 		}

v2/go.mod

@@ -1,12 +1,25 @@
 module github.com/hashicorp/raft-boltdb/v2
 
-go 1.16
+go 1.20
 
 require (
-	github.com/armon/go-metrics v0.0.0-20190430140413-ec5e00d3c878
+	github.com/armon/go-metrics v0.4.1
 	github.com/boltdb/bolt v1.3.1
-	github.com/hashicorp/go-msgpack v0.5.5
+	github.com/hashicorp/go-msgpack/v2 v2.1.1
 	github.com/hashicorp/raft v1.1.0
-	github.com/hashicorp/raft-boltdb v0.0.0-20210409134258-03c10cc3d4ea
+	github.com/hashicorp/raft-boltdb v0.0.0-20230125174641-2a8082862702
 	go.etcd.io/bbolt v1.3.5
 )
+
+require (
+	github.com/fatih/color v1.13.0 // indirect
+	github.com/hashicorp/go-hclog v1.5.0 // indirect
+	github.com/hashicorp/go-immutable-radix v1.0.0 // indirect
+	github.com/hashicorp/go-msgpack v0.5.5 // indirect
+	github.com/hashicorp/golang-lru v0.5.0 // indirect
+	github.com/mattn/go-colorable v0.1.12 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	golang.org/x/sys v0.13.0 // indirect
+)
+
+replace github.com/hashicorp/raft => /Users/swenson/projects/raft