moved to electron v9, still have issues with RequireJS and electron v10...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>

Viewer/package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "ImageGrid.Viewer.g4",
-  "version": "4.0.0-a",
+  "version": "4.0.0a",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -636,9 +636,9 @@
       }
     },
     "electron": {
-      "version": "7.3.3",
+      "version": "9.2.1",
-      "resolved": "https://registry.npmjs.org/electron/-/electron-7.3.3.tgz",
+      "resolved": "https://registry.npmjs.org/electron/-/electron-9.2.1.tgz",
-      "integrity": "sha512-PrJEsuRiaAhTDHtbH3EM+RIne+nZ6ifGChUadmtmPqHUQ+rIhf4jSi2ZN768IgBDw4SidMJiCrvQRiuDha9+Ew==",
+      "integrity": "sha512-ZsetaQjXB8+9/EFW1FnfK4ukpkwXCxMEaiKiUZhZ0ZLFlLnFCpe0Bg4vdDf7e4boWGcnlgN1jAJpBw7w0eXuqA==",
       "requires": {
         "@electron/get": "^1.0.1",
         "@types/node": "^12.0.12",

Viewer/package.json

@@ -20,7 +20,7 @@
   "dependencies": {
     "app-module-path": "^1.0.6",
     "async-json": "0.0.2",
-    "electron": "^7.0.0",
+    "electron": "^9.0.0",
     "exiftool": "^0.0.3",
     "fs-extra": "^7.0.1",
     "fs-walk": "^0.0.1",
@@ -48,11 +48,6 @@
   "optionalDependencies": {
     "pica": "^3.0.6"
   },
-  "optionalDependencies-disabled": {
-    "preact": "^8.2.7",
-    "react": "^15.6.2",
-    "react-dom": "^15.6.2"
-  },
   "devDependencies": {
     "asar": "^3.0.1",
     "electron-rebuild": "^1.11.0",