Fix various ESLint violations (#402)

## Description:

Fixes a number of ESLint violations. Although I have tested these
changes through the local dev server, I don't have a high confidence
that the testing is sufficient, as I am new to this codebase. This
change would benefit from heightened scrutiny.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:

fake.neo

---------

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>

src/client/GoogleAdElement.ts

@@ -3,7 +3,7 @@ import { customElement, property } from "lit/decorators.js";
 
 declare global {
   interface Window {
-    adsbygoogle: any[];
+    adsbygoogle: unknown[];
   }
 }
 
@@ -89,7 +89,7 @@ const isElectron = () => {
   if (
     typeof window !== "undefined" &&
     typeof window.process === "object" &&
-    // @ts-ignore
+    // @ts-expect-error hidden
     window.process.type === "renderer"
   ) {
     return true;