[gnome-characters] snap: use grade:stable

[Jeremy Bicha <jbicha src gnome org>]

commit 9f12937aa8262872049b7588e4f290ba41f0b72f
Author: Jeremy Bicha <jbicha ubuntu com>
Date:   Thu Jan 31 17:38:44 2019 -0500

    snap: use grade:stable
    
    required to push to candidate channel

 snap/snapcraft.yaml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/snap/snapcraft.yaml b/snap/snapcraft.yaml
index d7e990c..e3e4716 100644
--- a/snap/snapcraft.yaml
+++ b/snap/snapcraft.yaml
@@ -5,7 +5,7 @@ description: |
   Characters is a simple utility application to find and
   insert unusual characters.
 
-grade: devel # must be 'stable' to release into candidate/stable channels
+grade: stable # must be 'stable' to release into candidate/stable channels
 confinement: strict
 
 plugs:
@@ -96,6 +96,7 @@ parts:
       - yelp-tools
   gnome-characters:
     after: [gnome-desktop]
+    source-type: git
     source: .
     plugin: meson
     meson-parameters: [--buildtype=release, --prefix=/snap/gnome-characters/current/usr]