fix colorscheme decode

Author: georgeharker

VimR/VimR/MainWindow+Delegates.swift

@@ -4,6 +4,7 @@
  */
 
 import Cocoa
+import MessagePack
 import NvimView
 import RxNeovim
 import RxPack
@@ -101,6 +102,8 @@ extension MainWindow {
             for: .setTheme(Theme(from: nvimTheme, additionalColorDict: colors))
           )
         )
+      }, onError: {
+        err in self.log.trace("oops couldn't set theme")
       })
       .disposed(by: self.disposeBag)
   }
@@ -153,7 +156,8 @@ extension MainWindow {
         (
           colorName: colorName,
           observable: self.neoVimView.api
-            .getHlByName(name: colorName, rgb: true)
+            .getHl(ns_id: 0,
+                   opts: ["name": MessagePackValue(colorName)])
             .asObservable()
         )
       })