allow creation of group of size with only one member and us

Signal/src/Loki/View Controllers/NewClosedGroupVC.swift

@@ -171,7 +171,7 @@ final class NewClosedGroupVC : BaseVC, UITableViewDataSource, UITableViewDelegat
         guard name.count < 64 else {
             return showError(title: NSLocalizedString("vc_create_closed_group_group_name_too_long_error", comment: ""))
         }
-        guard selectedContacts.count >= 2 else {
+        guard selectedContacts.count >= 1 else {
             return showError(title: NSLocalizedString("vc_create_closed_group_not_enough_group_members_error", comment: ""))
         }
         guard selectedContacts.count < 50 else { // Minus one because we're going to include self later
@@ -211,7 +211,7 @@ final class NewClosedGroupVC : BaseVC, UITableViewDataSource, UITableViewDelegat
         guard name.count < 64 else {
             return showError(title: NSLocalizedString("vc_create_closed_group_group_name_too_long_error", comment: ""))
         }
-        guard selectedContacts.count >= 2 else {
+        guard selectedContacts.count >= 1 else {
             return showError(title: NSLocalizedString("vc_create_closed_group_not_enough_group_members_error", comment: ""))
         }
         guard selectedContacts.count < 10 else { // Minus one because we're going to include self later

Signal/translations/en.lproj/Localizable.strings

@@ -2647,7 +2647,7 @@
 "vc_create_closed_group_empty_state_button_title" = "Start a Session";
 "vc_create_closed_group_group_name_missing_error" = "Please enter a group name";
 "vc_create_closed_group_group_name_too_long_error" = "Please enter a shorter group name";
-"vc_create_closed_group_not_enough_group_members_error" = "Please pick at least 2 group members";
+"vc_create_closed_group_not_enough_group_members_error" = "Please pick at least 1 group member";
 "vc_create_closed_group_too_many_group_members_error" = "A closed group cannot have more than 10 members";
 "vc_create_closed_group_invalid_session_id_error" = "One of the members of your group has an invalid Session ID";