bump google.golang.org/grpc v1.20.1

full diff: https://github.com/grpc/grpc-go/compare/v1.12.2...v1.20.1

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

pkg/dialer/dialer.go

@@ -17,6 +17,7 @@
 package dialer
 
 import (
+	"context"
 	"net"
 	"time"
 
@@ -28,8 +29,19 @@ type dialResult struct {
 	err error
 }
 
+// ContextDialer returns a GRPC net.Conn connected to the provided address
+func ContextDialer(ctx context.Context, address string) (net.Conn, error) {
+	if deadline, ok := ctx.Deadline(); ok {
+		return timeoutDialer(address, time.Until(deadline))
+	}
+	return timeoutDialer(address, 0)
+}
+
 // Dialer returns a GRPC net.Conn connected to the provided address
-func Dialer(address string, timeout time.Duration) (net.Conn, error) {
+// Deprecated: use ContextDialer and grpc.WithContextDialer.
+var Dialer = timeoutDialer
+
+func timeoutDialer(address string, timeout time.Duration) (net.Conn, error) {
 	var (
 		stopC = make(chan struct{})
 		synC  = make(chan *dialResult)