Revert "Upgrade electron"

This reverts commit cefd9e95db.

package.json

@@ -70,7 +70,7 @@
     "app-builder-lib": "https://github.com/thomasnordquist/app-builder-lib.git",
     "axios": "^0.18.0",
     "chai": "^4.2.0",
-    "electron": "5.0.0-beta.8",
+    "electron": "^4.0.6",
     "electron-builder": "^20.38.5",
     "fs-extra": "^7.0.1",
     "mime": "^2.4.0",

src/MenuTemplate.ts

@@ -93,8 +93,9 @@ const viewMenu: MenuItemConstructorOptions = {
       click: () => {
         const window = BrowserWindow.getFocusedWindow()
         if (window) {
-          const zoom = window.webContents.getZoomFactor()
+          window.webContents.getZoomFactor((zoom) => {
             window.webContents.setZoomFactor(Math.min(zoom + 0.1, 2.0))
+          })
         }
       },
     },
@@ -104,8 +105,9 @@ const viewMenu: MenuItemConstructorOptions = {
       click: () => {
         const window = BrowserWindow.getFocusedWindow()
         if (window) {
-          const zoom = window.webContents.getZoomFactor()
+          window.webContents.getZoomFactor((zoom) => {
             window.webContents.setZoomFactor(Math.max(zoom - 0.1, 0.5))
+          })
         }
       },
     },

yarn.lock

@@ -1287,10 +1287,10 @@ electron-updater@^4.0.6:
     semver "^5.6.0"
     source-map-support "^0.5.9"
 
-electron@5.0.0-beta.8:
-  version "5.0.0-beta.8"
-  resolved "https://registry.yarnpkg.com/electron/-/electron-5.0.0-beta.8.tgz#f8f7e8a128ab91d69b4cc7c77b83b5c19fc0a2f7"
-  integrity sha512-fjnxYGSOttNDwL6en5mBRTOHi+dXQBfkQrxpl6964hrvGG6/TicpsYzhD9dYSO2f7ZYapby/buFzYgpYcoCFHg==
+electron@^4.0.6:
+  version "4.0.6"
+  resolved "https://registry.yarnpkg.com/electron/-/electron-4.0.6.tgz#f936772ddb5eaa026591ea14ef806e1385fbbda9"
+  integrity sha512-r2ow/EmDibjoCNJp35mB1CcPs2xBF9fp2eoWuUOJmpVQyzdba6EnqsSD1BxwXzF9vQ5WkQ2UbfXBIvpomrdioQ==
   dependencies:
     "@types/node" "^10.12.18"
     electron-download "^4.1.0"