Use goreleaser to build and release (#244)

Instead of using gox on one side and an action to release, we can merge
them together with goreleaser which will build for extra targets (arm,
mips if needed in the future) and it also takes care of creating
checksums, a source archive, and a changelog and creating a release with
all the artifacts.

All binaries should respect the old naming convention, so any scripts
out there should still work.

Signed-off-by: Itxaka <igarcia@suse.com>

vendor/google.golang.org/grpc/connectivity/connectivity.go

@@ -22,11 +22,11 @@
 package connectivity
 
 import (
-	"context"
-
 	"google.golang.org/grpc/grpclog"
 )
 
+var logger = grpclog.Component("core")
+
 // State indicates the state of connectivity.
 // It can be the state of a ClientConn or SubConn.
 type State int
@@ -44,7 +44,7 @@ func (s State) String() string {
 	case Shutdown:
 		return "SHUTDOWN"
 	default:
-		grpclog.Errorf("unknown connectivity state: %d", s)
+		logger.Errorf("unknown connectivity state: %d", s)
 		return "Invalid-State"
 	}
 }
@@ -61,13 +61,3 @@ const (
 	// Shutdown indicates the ClientConn has started shutting down.
 	Shutdown
 )
-
-// Reporter reports the connectivity states.
-type Reporter interface {
-	// CurrentState returns the current state of the reporter.
-	CurrentState() State
-	// WaitForStateChange blocks until the reporter's state is different from the given state,
-	// and returns true.
-	// It returns false if <-ctx.Done() can proceed (ctx got timeout or got canceled).
-	WaitForStateChange(context.Context, State) bool
-}