Update package.json

Author: schickling

packages/graphql-playground-electron/package.json

@@ -88,7 +88,7 @@
     "electron-localshortcut": "^2.0.2",
     "electron-log": "^2.2.13",
     "electron-squirrel-startup": "^1.0.0",
-    "electron-updater": "^2.17.6",
+    "electron-updater": "2.17.6",
     "find-up": "^2.1.0",
     "graphcool-styles": "^0.2.5",
     "graphcool-tmp-ui": "^0.0.11",
@@ -130,7 +130,7 @@
     "concurrently": "^3.5.1",
     "css-loader": "^0.23.1",
     "electron": "^1.7.10",
-    "electron-builder": "^19.49.2",
+    "electron-builder": "19.49.2",
     "electron-devtools-installer": "^2.2.3",
     "extract-text-webpack-plugin": "^2.0.0-beta.3",
     "file-loader": "^0.11.2",