[gjs/refactor-globals: 2/5] Update dangling comma eslint rule. - In ESLint v6, dangling commas on functions are now linted.

[Evan Welsh <ewlsh src gnome org>]

commit a7ceade86971994d6bd7dac7419859b0c4cb4588
Author: Evan Welsh <noreply evanwelsh com>
Date:   Mon Jun 22 19:31:57 2020 -0500

    Update dangling comma eslint rule.
    - In ESLint v6, dangling commas on functions are now linted.

 .eslintrc.yml                     | 4 +++-
 examples/gtk-application.js       | 6 +++---
 installed-tests/js/testTweener.js | 4 ++--
 3 files changed, 8 insertions(+), 6 deletions(-)
---
diff --git a/.eslintrc.yml b/.eslintrc.yml
index 3fa6b86b..7bcb5eb0 100644
--- a/.eslintrc.yml
+++ b/.eslintrc.yml
@@ -24,7 +24,9 @@ rules:
   #     allow: [^vfunc_, ^on_, _instance_init]
   comma-dangle:
     - error
-    - always-multiline
+    - arrays: always-multiline
+      objects: always-multiline
+      functions: never
   comma-spacing:
     - error
     - before: false
diff --git a/examples/gtk-application.js b/examples/gtk-application.js
index 514b8bdd..e8ea05a4 100644
--- a/examples/gtk-application.js
+++ b/examples/gtk-application.js
@@ -20,7 +20,7 @@ var ExampleApplication = GObject.registerClass({
             'ExampleProperty',                  // nickname
             'An example read write property',   // description
             GObject.ParamFlags.READWRITE,       // read/write/construct...
-            'a default value',
+            'a default value'
         ),
     },
     Signals: {'examplesig': {param_types: [GObject.TYPE_INT]}},
@@ -83,7 +83,7 @@ var ExampleApplication = GObject.registerClass({
         notif.set_title('Example Notification');
         notif.set_body('Example Body');
         notif.set_icon(
-            new Gio.ThemedIcon({name: 'dialog-information-symbolic'}),
+            new Gio.ThemedIcon({name: 'dialog-information-symbolic'})
         );
 
         // A default action for when the body of the notification is clicked
@@ -92,7 +92,7 @@ var ExampleApplication = GObject.registerClass({
         // A button for the notification
         notif.add_button(
             'Button Text',
-            "app.exampleAction('exampleParameter')",
+            "app.exampleAction('exampleParameter')"
         );
 
         // This won't actually be shown, since an application needs a .desktop
diff --git a/installed-tests/js/testTweener.js b/installed-tests/js/testTweener.js
index a674e074..1f6efe57 100644
--- a/installed-tests/js/testTweener.js
+++ b/installed-tests/js/testTweener.js
@@ -282,7 +282,7 @@ describe('Tweener', function () {
             },
             function (obj, val) {
                 obj.x = -val;
-            },
+            }
         );
 
         var objectA = {
@@ -343,7 +343,7 @@ describe('Tweener', function () {
             function (val) {
                 return [{name: 'x', value: val},
                     {name: 'y', value: -val}];
-            },
+            }
         );
 
         var objectA = {