diff --git a/vendor/google.golang.org/grpc/dialoptions.go b/vendor/google.golang.org/grpc/dialoptions.go
index 85786d6..15a3d51 100644
--- a/vendor/google.golang.org/grpc/dialoptions.go
+++ b/vendor/google.golang.org/grpc/dialoptions.go
@@ -20,22 +20,34 @@
 
 import (
 	"context"
-	"fmt"
 	"net"
 	"time"
 
 	"google.golang.org/grpc/backoff"
-	"google.golang.org/grpc/balancer"
+	"google.golang.org/grpc/channelz"
 	"google.golang.org/grpc/credentials"
 	"google.golang.org/grpc/credentials/insecure"
 	"google.golang.org/grpc/internal"
 	internalbackoff "google.golang.org/grpc/internal/backoff"
+	"google.golang.org/grpc/internal/binarylog"
 	"google.golang.org/grpc/internal/transport"
 	"google.golang.org/grpc/keepalive"
 	"google.golang.org/grpc/resolver"
 	"google.golang.org/grpc/stats"
 )
 
+func init() {
+	internal.AddGlobalDialOptions = func(opt ...DialOption) {
+		globalDialOptions = append(globalDialOptions, opt...)
+	}
+	internal.ClearGlobalDialOptions = func() {
+		globalDialOptions = nil
+	}
+	internal.WithBinaryLogger = withBinaryLogger
+	internal.JoinDialOptions = newJoinDialOption
+	internal.DisableGlobalDialOptions = newDisableGlobalDialOptions
+}
+
 // dialOptions configure a Dial call. dialOptions are set by the DialOption
 // values passed to Dial.
 type dialOptions struct {
@@ -45,19 +57,18 @@
 	chainUnaryInts  []UnaryClientInterceptor
 	chainStreamInts []StreamClientInterceptor
 
-	cp              Compressor
-	dc              Decompressor
-	bs              internalbackoff.Strategy
-	block           bool
-	returnLastError bool
-	timeout         time.Duration
-	scChan          <-chan ServiceConfig
-	authority       string
-	copts           transport.ConnectOptions
-	callOptions     []CallOption
-	// This is used by WithBalancerName dial option.
-	balancerBuilder             balancer.Builder
-	channelzParentID            int64
+	cp                          Compressor
+	dc                          Decompressor
+	bs                          internalbackoff.Strategy
+	block                       bool
+	returnLastError             bool
+	timeout                     time.Duration
+	scChan                      <-chan ServiceConfig
+	authority                   string
+	binaryLogger                binarylog.Logger
+	copts                       transport.ConnectOptions
+	callOptions                 []CallOption
+	channelzParentID            *channelz.Identifier
 	disableServiceConfig        bool
 	disableRetry                bool
 	disableHealthCheck          bool
@@ -66,6 +77,7 @@
 	defaultServiceConfig        *ServiceConfig // defaultServiceConfig is parsed from defaultServiceConfigRawJSON.
 	defaultServiceConfigRawJSON *string
 	resolvers                   []resolver.Builder
+	idleTimeout                 time.Duration
 }
 
 // DialOption configures how we set up the connection.
@@ -73,6 +85,8 @@
 	apply(*dialOptions)
 }
 
+var globalDialOptions []DialOption
+
 // EmptyDialOption does not alter the dial configuration. It can be embedded in
 // another structure to build custom dial options.
 //
@@ -84,6 +98,16 @@
 
 func (EmptyDialOption) apply(*dialOptions) {}
 
+type disableGlobalDialOptions struct{}
+
+func (disableGlobalDialOptions) apply(*dialOptions) {}
+
+// newDisableGlobalDialOptions returns a DialOption that prevents the ClientConn
+// from applying the global DialOptions (set via AddGlobalDialOptions).
+func newDisableGlobalDialOptions() DialOption {
+	return &disableGlobalDialOptions{}
+}
+
 // funcDialOption wraps a function that modifies dialOptions into an
 // implementation of the DialOption interface.
 type funcDialOption struct {
@@ -100,13 +124,28 @@
 	}
 }
 
+type joinDialOption struct {
+	opts []DialOption
+}
+
+func (jdo *joinDialOption) apply(do *dialOptions) {
+	for _, opt := range jdo.opts {
+		opt.apply(do)
+	}
+}
+
+func newJoinDialOption(opts ...DialOption) DialOption {
+	return &joinDialOption{opts: opts}
+}
+
 // WithWriteBufferSize determines how much data can be batched before doing a
 // write on the wire. The corresponding memory allocation for this buffer will
 // be twice the size to keep syscalls low. The default value for this buffer is
 // 32KB.
 //
-// Zero will disable the write buffer such that each write will be on underlying
-// connection. Note: A Send call may not directly translate to a write.
+// Zero or negative values will disable the write buffer such that each write
+// will be on underlying connection. Note: A Send call may not directly
+// translate to a write.
 func WithWriteBufferSize(s int) DialOption {
 	return newFuncDialOption(func(o *dialOptions) {
 		o.copts.WriteBufferSize = s
@@ -116,8 +155,9 @@
 // WithReadBufferSize lets you set the size of read buffer, this determines how
 // much data can be read at most for each read syscall.
 //
-// The default value for this buffer is 32KB. Zero will disable read buffer for
-// a connection so data framer can access the underlying conn directly.
+// The default value for this buffer is 32KB. Zero or negative values will
+// disable read buffer for a connection so data framer can access the
+// underlying conn directly.
 func WithReadBufferSize(s int) DialOption {
 	return newFuncDialOption(func(o *dialOptions) {
 		o.copts.ReadBufferSize = s
@@ -195,25 +235,6 @@
 	})
 }
 
-// WithBalancerName sets the balancer that the ClientConn will be initialized
-// with. Balancer registered with balancerName will be used. This function
-// panics if no balancer was registered by balancerName.
-//
-// The balancer cannot be overridden by balancer option specified by service
-// config.
-//
-// Deprecated: use WithDefaultServiceConfig and WithDisableServiceConfig
-// instead.  Will be removed in a future 1.x release.
-func WithBalancerName(balancerName string) DialOption {
-	builder := balancer.Get(balancerName)
-	if builder == nil {
-		panic(fmt.Sprintf("grpc.WithBalancerName: no balancer is registered for name %v", balancerName))
-	}
-	return newFuncDialOption(func(o *dialOptions) {
-		o.balancerBuilder = builder
-	})
-}
-
 // WithServiceConfig returns a DialOption which has a channel to read the
 // service configuration.
 //
@@ -275,6 +296,9 @@
 // WithBlock returns a DialOption which makes callers of Dial block until the
 // underlying connection is up. Without this, Dial returns immediately and
 // connecting the server happens in background.
+//
+// Use of this feature is not recommended.  For more information, please see:
+// https://github.com/grpc/grpc-go/blob/master/Documentation/anti-patterns.md
 func WithBlock() DialOption {
 	return newFuncDialOption(func(o *dialOptions) {
 		o.block = true
@@ -286,6 +310,9 @@
 // the context.DeadlineExceeded error.
 // Implies WithBlock()
 //
+// Use of this feature is not recommended.  For more information, please see:
+// https://github.com/grpc/grpc-go/blob/master/Documentation/anti-patterns.md
+//
 // # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
@@ -304,8 +331,8 @@
 // WithCredentialsBundle or WithPerRPCCredentials) which require transport
 // security is incompatible and will cause grpc.Dial() to fail.
 //
-// Deprecated: use WithTransportCredentials and insecure.NewCredentials() instead.
-// Will be supported throughout 1.x.
+// Deprecated: use WithTransportCredentials and insecure.NewCredentials()
+// instead. Will be supported throughout 1.x.
 func WithInsecure() DialOption {
 	return newFuncDialOption(func(o *dialOptions) {
 		o.copts.TransportCredentials = insecure.NewCredentials()
@@ -402,7 +429,21 @@
 // all the RPCs and underlying network connections in this ClientConn.
 func WithStatsHandler(h stats.Handler) DialOption {
 	return newFuncDialOption(func(o *dialOptions) {
-		o.copts.StatsHandler = h
+		if h == nil {
+			logger.Error("ignoring nil parameter in grpc.WithStatsHandler ClientOption")
+			// Do not allow a nil stats handler, which would otherwise cause
+			// panics.
+			return
+		}
+		o.copts.StatsHandlers = append(o.copts.StatsHandlers, h)
+	})
+}
+
+// withBinaryLogger returns a DialOption that specifies the binary logger for
+// this ClientConn.
+func withBinaryLogger(bl binarylog.Logger) DialOption {
+	return newFuncDialOption(func(o *dialOptions) {
+		o.binaryLogger = bl
 	})
 }
 
@@ -414,6 +455,9 @@
 // FailOnNonTempDialError only affects the initial dial, and does not do
 // anything useful unless you are also using WithBlock().
 //
+// Use of this feature is not recommended.  For more information, please see:
+// https://github.com/grpc/grpc-go/blob/master/Documentation/anti-patterns.md
+//
 // # Experimental
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
@@ -498,7 +542,7 @@
 //
 // Notice: This API is EXPERIMENTAL and may be changed or removed in a
 // later release.
-func WithChannelzParentID(id int64) DialOption {
+func WithChannelzParentID(id *channelz.Identifier) DialOption {
 	return newFuncDialOption(func(o *dialOptions) {
 		o.channelzParentID = id
 	})
@@ -539,9 +583,6 @@
 // service config enables them.  This does not impact transparent retries, which
 // will happen automatically if no data is written to the wire or if the RPC is
 // unprocessed by the remote server.
-//
-// Retry support is currently enabled by default, but may be disabled by
-// setting the environment variable "GRPC_GO_RETRY" to "off".
 func WithDisableRetry() DialOption {
 	return newFuncDialOption(func(o *dialOptions) {
 		o.disableRetry = true
@@ -615,3 +656,23 @@
 		o.resolvers = append(o.resolvers, rs...)
 	})
 }
+
+// WithIdleTimeout returns a DialOption that configures an idle timeout for the
+// channel. If the channel is idle for the configured timeout, i.e there are no
+// ongoing RPCs and no new RPCs are initiated, the channel will enter idle mode
+// and as a result the name resolver and load balancer will be shut down. The
+// channel will exit idle mode when the Connect() method is called or when an
+// RPC is initiated.
+//
+// By default this feature is disabled, which can also be explicitly configured
+// by passing zero to this function.
+//
+// # Experimental
+//
+// Notice: This API is EXPERIMENTAL and may be changed or removed in a
+// later release.
+func WithIdleTimeout(d time.Duration) DialOption {
+	return newFuncDialOption(func(o *dialOptions) {
+		o.idleTimeout = d
+	})
+}