Switch to Node.js 16 LTS, upgrade TypeScript, ESLint, and other dependencies (#395)

* Upgrade TypeScript, ESLint, and other dependencies

This also cleans up various other files where newer ESLint rules complained

* Set CI and CD to use Node.js version 16

* Small tweak

* Fix CD version printing

* Add nvm version for Cloudflare Pages

frontend/src/components/widgets/inputs/RadioInput.vue

@@ -53,7 +53,6 @@
 	.icon-label,
 	.text-label {
 		display: inline-block;
-		vertical-align: top;
 	}
 
 	.text-label {
@@ -73,7 +72,7 @@ export interface RadioEntryData {
 	label?: string;
 	icon?: string;
 	tooltip?: string;
-	action?: Function;
+	action?: () => void;
 }
 
 export type RadioEntries = Array<RadioEntryData>;

frontend/src/components/widgets/inputs/ShelfItemInput.vue

@@ -24,7 +24,6 @@
 	svg {
 		width: 24px;
 		height: 24px;
-		vertical-align: top;
 	}
 }
 </style>