Enforce EOL newlines in CSS files (#31174)

webapp/channels/.stylelintrc.json

@@ -8,6 +8,7 @@
     ],
     "rules": {
         "@stylistic/indentation": 4,
+        "@stylistic/no-missing-end-of-source-newline": true,
         "no-descending-specificity": null,
         "font-family-no-missing-generic-family-keyword": null,
         "property-no-unknown": [

webapp/channels/package.json

@@ -103,7 +103,7 @@
     "@mattermost/eslint-plugin": "*",
     "@mattermost/mmjstool": "github:mattermost/mattermost-utilities#7b63833d208d482ba4a1c12230bb3e68dd9c5e5e",
     "@redux-devtools/extension": "3.2.3",
-    "@stylistic/stylelint-plugin": "2.1.0",
+    "@stylistic/stylelint-plugin": "3.1.2",
     "@testing-library/jest-dom": "5.16.4",
     "@testing-library/react": "12.1.4",
     "@testing-library/react-hooks": "8.0.1",

webapp/channels/src/components/admin_console/access_control/editors/shared.scss

@@ -52,4 +52,4 @@
         cursor: not-allowed;
         opacity: 0.4;
     }
-}
+}

webapp/channels/src/components/admin_console/access_control/editors/table_editor/selector_menus.scss

@@ -43,4 +43,4 @@
             margin-right: 8px;
         }
     }
-} 
+}

webapp/channels/src/components/invitation_modal/no_permissions_view.scss

@@ -28,4 +28,4 @@
         font-size: 14px;
         text-align: left;
     }
-}
+}

webapp/channels/src/components/purchase_modal/icon_message.scss

@@ -107,4 +107,4 @@
             }
         }
     }
-}
+}

webapp/channels/src/components/threading/virtualized_thread_viewer/virtualized_thread_viewer.scss

@@ -4,4 +4,4 @@
         height: 100%;
         flex-direction: column;
     }
-}
+}