Upgrade various dependencies to latest part 2 (#1557)

* Upgrade various dependencies to latest, remove unnecessary electron-hunspell
  - upgrade eslint and friends to latest
  - remove deprecated 'node-sass' in favor of 'sass'
  - disable new rules from 'eslint-config-airbnb' that are conflicting with current code style
  - add workspace config for 'vscode' that silences 'experimentalDecorator' warning and forces 'prettier' to single quote
* Run yarn lint to autofix with new ruleset and worked down lint issues to zero

3 files changed, 3 insertions, 4 deletions

diff --git a/src/stores/AppStore.js b/src/stores/AppStore.js
index dd4ab3629..3116677c2 100644
--- a/src/stores/AppStore.js
+++ b/src/stores/AppStore.js
@@ -127,7 +127,6 @@ export default class AppStore extends Store {
       this.isFullScreen = false;
     });
 
-
     this.isOnline = navigator.onLine;
 
     // Check if Ferdi should launch on start
@@ -474,7 +473,6 @@ export default class AppStore extends Store {
       locale = this.stores.user.data.locale;
     }
 
-
     if (locale && Object.prototype.hasOwnProperty.call(locales, locale) && locale !== this.locale) {
       this.locale = locale;
     } else if (!locale) {
diff --git a/src/stores/FeaturesStore.js b/src/stores/FeaturesStore.js
index 631d0318e..2fee9bdda 100644
--- a/src/stores/FeaturesStore.js
+++ b/src/stores/FeaturesStore.js
@@ -33,7 +33,7 @@ export default class FeaturesStore extends Store {
 
   @observable featuresRequest = new CachedRequest(this.api.features, 'features');
 
-  @observable features = Object.assign({}, DEFAULT_FEATURES_CONFIG);
+  @observable features = ({ ...DEFAULT_FEATURES_CONFIG });
 
   async setup() {
     this.registerReactions([
@@ -57,7 +57,7 @@ export default class FeaturesStore extends Store {
   }
 
   _updateFeatures = () => {
-    const features = Object.assign({}, DEFAULT_FEATURES_CONFIG);
+    const features = { ...DEFAULT_FEATURES_CONFIG };
     if (this.stores.user.isLoggedIn) {
       let requestResult = {};
       try {
diff --git a/src/stores/ServicesStore.js b/src/stores/ServicesStore.js
index 3dba217b2..9b69cb7c6 100644
--- a/src/stores/ServicesStore.js
+++ b/src/stores/ServicesStore.js
@@ -306,6 +306,7 @@ export default class ServicesStore extends Store {
     }
 
     // set default values for serviceData
+    // eslint-disable-next-line prefer-object-spread
     Object.assign({
       isEnabled: true,
       isHibernationEnabled: false,