Add Snapcraft builds

Author: GitSquared

.travis.yml

@@ -19,7 +19,7 @@ script:
     -v ${PWD}:/project \
     -v ~/.cache/electron:/root/.cache/electron \
     -v ~/.cache/electron-builder:/root/.cache/electron-builder \
-    electronuserland/builder:wine \
+    electronuserland/builder \
     /bin/bash -c "npm install -g greenkeeper-lockfile@1 && npm run install-linux && greenkeeper-lockfile-update && npm run build && greenkeeper-lockfile-upload"
 
 before_cache:

package.json

@@ -59,8 +59,17 @@
             "ia32",
             "armv7l"
           ]
+        },
+        {
+          "target": "snap",
+          "arch": [
+            "x64",
+            "ia32",
+            "armv7l"
+          ]
         }
       ],
+      "category": "System",
       "icon": "media/linuxIcons"
     },
     "win": {
@@ -82,6 +91,6 @@
     "electron-builder": "19.52.1",
     "electron-rebuild": "1.6.0",
     "node-json-minify": "1.0.0",
-    "uglify-es": "^3.3.4"
+    "uglify-es": "3.3.4"
   }
 }