diff --git a/vendor/go.etcd.io/etcd/clientv3/op.go b/vendor/go.etcd.io/etcd/clientv3/op.go
index 81ae31f..3dca41b 100644
--- a/vendor/go.etcd.io/etcd/clientv3/op.go
+++ b/vendor/go.etcd.io/etcd/clientv3/op.go
@@ -14,7 +14,7 @@
 
 package clientv3
 
-import pb "go.etcd.io/etcd/etcdserver/etcdserverpb"
+import pb "github.com/coreos/etcd/etcdserver/etcdserverpb"
 
 type opType int
 
@@ -26,7 +26,9 @@
 	tTxn
 )
 
-var noPrefixEnd = []byte{0}
+var (
+	noPrefixEnd = []byte{0}
+)
 
 // Op represents an Operation that kv can execute.
 type Op struct {
@@ -81,15 +83,8 @@
 
 // accessors / mutators
 
-// IsTxn returns true if the "Op" type is transaction.
-func (op Op) IsTxn() bool {
-	return op.t == tTxn
-}
-
-// Txn returns the comparison(if) operations, "then" operations, and "else" operations.
-func (op Op) Txn() ([]Cmp, []Op, []Op) {
-	return op.cmps, op.thenOps, op.elseOps
-}
+func (op Op) IsTxn() bool              { return op.t == tTxn }
+func (op Op) Txn() ([]Cmp, []Op, []Op) { return op.cmps, op.thenOps, op.elseOps }
 
 // KeyBytes returns the byte slice holding the Op's key.
 func (op Op) KeyBytes() []byte { return op.key }
@@ -113,13 +108,13 @@
 func (op Op) IsDelete() bool { return op.t == tDeleteRange }
 
 // IsSerializable returns true if the serializable field is true.
-func (op Op) IsSerializable() bool { return op.serializable }
+func (op Op) IsSerializable() bool { return op.serializable == true }
 
 // IsKeysOnly returns whether keysOnly is set.
-func (op Op) IsKeysOnly() bool { return op.keysOnly }
+func (op Op) IsKeysOnly() bool { return op.keysOnly == true }
 
 // IsCountOnly returns whether countOnly is set.
-func (op Op) IsCountOnly() bool { return op.countOnly }
+func (op Op) IsCountOnly() bool { return op.countOnly == true }
 
 // MinModRev returns the operation's minimum modify revision.
 func (op Op) MinModRev() int64 { return op.minModRev }
@@ -216,23 +211,13 @@
 	return op.t != tRange
 }
 
-// OpGet returns "get" operation based on given key and operation options.
 func OpGet(key string, opts ...OpOption) Op {
-	// WithPrefix and WithFromKey are not supported together
-	if isWithPrefix(opts) && isWithFromKey(opts) {
-		panic("`WithPrefix` and `WithFromKey` cannot be set at the same time, choose one")
-	}
 	ret := Op{t: tRange, key: []byte(key)}
 	ret.applyOpts(opts)
 	return ret
 }
 
-// OpDelete returns "delete" operation based on given key and operation options.
 func OpDelete(key string, opts ...OpOption) Op {
-	// WithPrefix and WithFromKey are not supported together
-	if isWithPrefix(opts) && isWithFromKey(opts) {
-		panic("`WithPrefix` and `WithFromKey` cannot be set at the same time, choose one")
-	}
 	ret := Op{t: tDeleteRange, key: []byte(key)}
 	ret.applyOpts(opts)
 	switch {
@@ -260,7 +245,6 @@
 	return ret
 }
 
-// OpPut returns "put" operation based on given key-value and operation options.
 func OpPut(key, val string, opts ...OpOption) Op {
 	ret := Op{t: tPut, key: []byte(key), val: []byte(val)}
 	ret.applyOpts(opts)
@@ -289,7 +273,6 @@
 	return ret
 }
 
-// OpTxn returns "txn" operation based on given transaction conditions.
 func OpTxn(cmps []Cmp, thenOps []Op, elseOps []Op) Op {
 	return Op{t: tTxn, cmps: cmps, thenOps: thenOps, elseOps: elseOps}
 }
@@ -400,14 +383,7 @@
 
 // WithFromKey specifies the range of 'Get', 'Delete', 'Watch' requests
 // to be equal or greater than the key in the argument.
-func WithFromKey() OpOption {
-	return func(op *Op) {
-		if len(op.key) == 0 {
-			op.key = []byte{0}
-		}
-		op.end = []byte("\x00")
-	}
-}
+func WithFromKey() OpOption { return WithRange("\x00") }
 
 // WithSerializable makes 'Get' request serializable. By default,
 // it's linearizable. Serializable requests are better for lower latency
@@ -496,17 +472,6 @@
 	}
 }
 
-// WithFragment to receive raw watch response with fragmentation.
-// Fragmentation is disabled by default. If fragmentation is enabled,
-// etcd watch server will split watch response before sending to clients
-// when the total size of watch events exceed server-side request limit.
-// The default server-side request limit is 1.5 MiB, which can be configured
-// as "--max-request-bytes" flag value + gRPC-overhead 512 bytes.
-// See "etcdserver/api/v3rpc/watch.go" for more details.
-func WithFragment() OpOption {
-	return func(op *Op) { op.fragment = true }
-}
-
 // WithIgnoreValue updates the key using its current value.
 // This option can not be combined with non-empty values.
 // Returns an error if the key does not exist.
@@ -553,8 +518,13 @@
 	return &pb.LeaseTimeToLiveRequest{ID: int64(id), Keys: ret.attachedKeys}
 }
 
-// isWithPrefix returns true if WithPrefix is being called in the op
-func isWithPrefix(opts []OpOption) bool { return isOpFuncCalled("WithPrefix", opts) }
-
-// isWithFromKey returns true if WithFromKey is being called in the op
-func isWithFromKey(opts []OpOption) bool { return isOpFuncCalled("WithFromKey", opts) }
+// WithFragment to receive raw watch response with fragmentation.
+// Fragmentation is disabled by default. If fragmentation is enabled,
+// etcd watch server will split watch response before sending to clients
+// when the total size of watch events exceed server-side request limit.
+// The default server-side request limit is 1.5 MiB, which can be configured
+// as "--max-request-bytes" flag value + gRPC-overhead 512 bytes.
+// See "etcdserver/api/v3rpc/watch.go" for more details.
+func WithFragment() OpOption {
+	return func(op *Op) { op.fragment = true }
+}