fixup SignalGroup struct & signal-cli daemon cmd for 0.7.4

fixup.patch

commit 132eb3276585e8d33801e109094cbd00ca59a8d9
Author: kverb <ken@kverb.com>
Date:   Wed Jan 20 10:38:40 2021 -0800

    fixup SignalGroup struct & signal-cli daemon cmd for 0.7.4
    
    As of signal-cli v.0.7.4, the exec command needs to be slightly changed
    in order to scan stdout correctly.
    
    This might just be an issue with a warning message being emitted in
    signal-cli's output. Perhaps the `processWire` command just needs a
    more robust handling of stdout lines.
    
    The signalGroup struct appears to fix a crash with serializing from JSON
    
    ----
    
    tested by nuking .local data & re-linking device with signal-cli v.0.7.4
    
    `make build && bin/siggo -d`
    
    before patch, siggo loads by chat history is empty
    after patch, siggo loads contacts and groups.
    tested sending message to a contact as well.

diff --git a/signal/signal.go b/signal/signal.go
index 96f5546..443e11f 100644
--- a/signal/signal.go
+++ b/signal/signal.go
@@ -55,6 +55,7 @@ type SignalContact struct {
 	Blocked               bool   `json:"blocked"`
 	InboxPosition         *int   `json:"inboxPosition"`
 	Archived              bool   `json:"archived"`
+        UUID                  string `json:uuid"` 
 }
 
 // SignalGroup is the data that signal-cli saves for each group
@@ -62,12 +63,13 @@ type SignalContact struct {
 type SignalGroup struct {
 	GroupID               string               `json:"groupId"`
 	Name                  string               `json:"name"`
-	Members               []*SignalGroupMember `json:"members"`
+	Members               []*string            `json:"members"`
 	Color                 string               `json:"color"`
 	Blocked               bool                 `json:"blocked"`
 	InboxPosition         *int                 `json:"inboxPosition"`
 	Archived              bool                 `json:"archived"`
 	MessageExpirationTime int                  `json:"messageExpirationTime"`
+        ExpectedV2Id          string               `json:"expectedV2Id"`
 }
 
 // SignalGroupMember is a member of a signal group
@@ -202,7 +204,7 @@ func (s *Signal) ReceiveForever() {
 
 // Daemon starts the dbus daemon and receives forever.
 func (s *Signal) Daemon() error {
-	cmd := exec.Command("signal-cli", "-u", s.uname, "daemon", "--json")
+	cmd := exec.Command("signal-cli", "--output=json", "-u", s.uname, "daemon")
 
 	//  This is the only way to ensure that the signal-cli daemon is killed when we get
 	//  SIGKILL, but it isn't available on MacOS, so we leave it commented out for now.