yarn upgrade + dep fix

Set `@electron/remote` range to avoid version `2.0.4` as the typings are
bogus.

packages/core/README.md

@@ -69,8 +69,8 @@ export class SomeClass {
 ## Re-Exports
 
 - `@theia/core/electron-shared/...`
-    - `@electron/remote` (from [`@electron/remote@^2.0.1`](https://www.npmjs.com/package/@electron/remote))
-    - `@electron/remote/main` (from [`@electron/remote@^2.0.1`](https://www.npmjs.com/package/@electron/remote))
+    - `@electron/remote` (from [`@electron/remote@^2.0.1 <2.0.4 || >2.0.4`](https://www.npmjs.com/package/@electron/remote))
+    - `@electron/remote/main` (from [`@electron/remote@^2.0.1 <2.0.4 || >2.0.4`](https://www.npmjs.com/package/@electron/remote))
     - `native-keymap` (from [`native-keymap@^2.2.1`](https://www.npmjs.com/package/native-keymap))
     - `electron` (from [`electron@^15.3.5`](https://www.npmjs.com/package/electron))
     - `electron-store` (from [`electron-store@^8.0.0`](https://www.npmjs.com/package/electron-store))

packages/electron/README.md

@@ -17,8 +17,8 @@ The `@theia/electron` extension bundles all Electron-specific dependencies and c
 ## Re-Exports
 
 - `@theia/electron/shared/...`
-    - `@electron/remote` (from [`@electron/remote@^2.0.1`](https://www.npmjs.com/package/@electron/remote))
-    - `@electron/remote/main` (from [`@electron/remote@^2.0.1`](https://www.npmjs.com/package/@electron/remote))
+    - `@electron/remote` (from [`@electron/remote@^2.0.1 <2.0.4 || >2.0.4`](https://www.npmjs.com/package/@electron/remote))
+    - `@electron/remote/main` (from [`@electron/remote@^2.0.1 <2.0.4 || >2.0.4`](https://www.npmjs.com/package/@electron/remote))
     - `native-keymap` (from [`native-keymap@^2.2.1`](https://www.npmjs.com/package/native-keymap))
     - `electron` (from [`electron@^15.3.5`](https://www.npmjs.com/package/electron))
     - `electron-store` (from [`electron-store@^8.0.0`](https://www.npmjs.com/package/electron-store))

packages/electron/package.json

@@ -3,7 +3,7 @@
   "version": "1.22.1",
   "description": "Theia - Electron utility package",
   "dependencies": {
-    "@electron/remote": "^2.0.1",
+    "@electron/remote": "^2.0.1 <2.0.4 || >2.0.4",
     "electron-store": "^8.0.0",
     "fix-path": "^3.0.0",
     "native-keymap": "^2.2.1"

packages/plugin-ext/src/main/electron-browser/webview/electron-webview-widget-factory.ts

@@ -35,7 +35,7 @@ export class ElectronWebviewWidgetFactory extends WebviewWidgetFactory {
      * @param endpoint cookie's target url
      */
     protected async attachElectronSecurityCookie(endpoint: string): Promise<void> {
-        await electronRemote.session.defaultSession!.cookies.set({
+        await electronRemote.session.defaultSession.cookies.set({
             url: endpoint,
             name: ElectronSecurityToken,
             value: JSON.stringify(this.container.get(ElectronSecurityToken)),
@@ -59,7 +59,7 @@ export class ElectronCustomEditorWidgetFactory extends CustomEditorWidgetFactory
      * @param endpoint cookie's target url
      */
     protected async attachElectronSecurityCookie(endpoint: string): Promise<void> {
-        await electronRemote.session.defaultSession!.cookies.set({
+        await electronRemote.session.defaultSession.cookies.set({
             url: endpoint,
             name: ElectronSecurityToken,
             value: JSON.stringify(this.container.get(ElectronSecurityToken)),