Staticcheck: deprecated warnings

[nkcr]

Staticcheck outputs some deprecated warning that will have to be adressed:

staticcheck ./...
internal/testing/mod.go:8:2: package github.com/golang/protobuf/descriptor is deprecated: See the "google.golang.org/protobuf/reflect/protoreflect" package for how to obtain an EnumDescriptor or MessageDescriptor in order to programatically interact with the protobuf type system.  (SA1019)
internal/testing/mod.go:9:2: package github.com/golang/protobuf/proto is deprecated: Use the "google.golang.org/protobuf/proto" package instead.  (SA1019)
internal/testing/mod.go:23:11: descriptor.Message is deprecated: The Descriptor method may not be generated by future versions of protoc-gen-go, meaning that this interface may not be implemented by many concrete message types.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:44:9: xxx_messageInfo_Certificate.Unmarshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:47:9: xxx_messageInfo_Certificate.Marshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:50:2: xxx_messageInfo_Certificate.Merge is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:53:9: xxx_messageInfo_Certificate.Size is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:56:2: xxx_messageInfo_Certificate.DiscardUnknown is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:59:33: proto.InternalMessageInfo is deprecated: Do not use; this type existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:89:9: xxx_messageInfo_CertificateAck.Unmarshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:92:9: xxx_messageInfo_CertificateAck.Marshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:95:2: xxx_messageInfo_CertificateAck.Merge is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:98:9: xxx_messageInfo_CertificateAck.Size is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:101:2: xxx_messageInfo_CertificateAck.DiscardUnknown is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:104:36: proto.InternalMessageInfo is deprecated: Do not use; this type existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:124:9: xxx_messageInfo_JoinRequest.Unmarshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:127:9: xxx_messageInfo_JoinRequest.Marshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:130:2: xxx_messageInfo_JoinRequest.Merge is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:133:9: xxx_messageInfo_JoinRequest.Size is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:136:2: xxx_messageInfo_JoinRequest.DiscardUnknown is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:139:33: proto.InternalMessageInfo is deprecated: Do not use; this type existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:172:9: xxx_messageInfo_JoinResponse.Unmarshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:175:9: xxx_messageInfo_JoinResponse.Marshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:178:2: xxx_messageInfo_JoinResponse.Merge is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:181:9: xxx_messageInfo_JoinResponse.Size is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:184:2: xxx_messageInfo_JoinResponse.DiscardUnknown is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:187:34: proto.InternalMessageInfo is deprecated: Do not use; this type existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:214:9: xxx_messageInfo_Message.Unmarshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:217:9: xxx_messageInfo_Message.Marshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:220:2: xxx_messageInfo_Message.Merge is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:223:9: xxx_messageInfo_Message.Size is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:226:2: xxx_messageInfo_Message.DiscardUnknown is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:229:29: proto.InternalMessageInfo is deprecated: Do not use; this type existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:261:9: xxx_messageInfo_Packet.Unmarshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:264:9: xxx_messageInfo_Packet.Marshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:267:2: xxx_messageInfo_Packet.Merge is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:270:9: xxx_messageInfo_Packet.Size is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:273:2: xxx_messageInfo_Packet.DiscardUnknown is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:276:28: proto.InternalMessageInfo is deprecated: Do not use; this type existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:301:9: xxx_messageInfo_Ack.Unmarshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:304:9: xxx_messageInfo_Ack.Marshal is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:307:2: xxx_messageInfo_Ack.Merge is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:310:9: xxx_messageInfo_Ack.Size is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:313:2: xxx_messageInfo_Ack.DiscardUnknown is deprecated: Do not use; this method existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:316:25: proto.InternalMessageInfo is deprecated: Do not use; this type existed for intenal-use only.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:326:2: proto.RegisterType is deprecated: Use protoregistry.GlobalTypes.RegisterMessage instead.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:327:2: proto.RegisterType is deprecated: Use protoregistry.GlobalTypes.RegisterMessage instead.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:328:2: proto.RegisterType is deprecated: Use protoregistry.GlobalTypes.RegisterMessage instead.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:329:2: proto.RegisterType is deprecated: Use protoregistry.GlobalTypes.RegisterMessage instead.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:330:2: proto.RegisterType is deprecated: Use protoregistry.GlobalTypes.RegisterMessage instead.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:331:2: proto.RegisterType is deprecated: Use protoregistry.GlobalTypes.RegisterMessage instead.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:332:2: proto.RegisterType is deprecated: Use protoregistry.GlobalTypes.RegisterMessage instead.  (SA1019)
mino/minogrpc/ptypes/overlay.pb.go:336:2: proto.RegisterFile is deprecated: Use protoregistry.GlobalFiles.RegisterFile instead.  (SA1019)
make: *** [lint] Error 1