refactor: bring down eslint warnings to zero (#1714)

- install `@eslint-react/eslint-plugin` dependency
- configure `@eslint-react/eslint-plugin` in eslint config
- modernize `lint` command in `package.json`
- disable or fix various reported lint issues
- fix `div` being nested in `p` for settings
- replace deprecated `event.keyCode` with `event.key`
- update isEscKeyPress method and unit tests which used deprecated `event.keyCode`
- allow `eslint` v8 as peer dependency for `@eslint-react/eslint-plugin`

1 files changed, 2 insertions, 2 deletions

diff --git a/src/components/downloadManager/DownloadManagerLayout.tsx b/src/components/downloadManager/DownloadManagerLayout.tsx
index 08c0ace1e..43670355c 100644
--- a/src/components/downloadManager/DownloadManagerLayout.tsx
+++ b/src/components/downloadManager/DownloadManagerLayout.tsx
@@ -44,8 +44,8 @@ class DownloadManagerLayout extends Component<IProps> {
     );
   }
 
-  handleKeyDown(e) {
-    if (isEscKeyPress(e.keyCode)) {
+  handleKeyDown(e: KeyboardEvent) {
+    if (isEscKeyPress(e.key)) {
       this.props.actions!.ui.closeSettings();
     }
   }