internal: Add lints for promises (#3733)

* Add lints for floating and misued promises

* Add logging async errors in main

* Add async error catch in test-utils

* Change any to unknown

* Trap promise errors and ignore more await warnings

* Add more ignores and toSync helper

* Fix more lint warnings

* Add more ignores and fixes

* Add more reject reporting

* Add accepting arbitrary parameters to toSync()

* Fix more lints

* Revert unintentional change to non-arrow function

* Revert unintentional change to use arrow function

* Fix new warnings in main with auto updater

* Fix formatting

* Change lints to error

This is what the recommended type checked rules do.

* Fix to properly report promise rejections

* Fix formatting

* Fix formatting

* Remove unused import

* Remove unused convenience function

* Move type helpers

* Fix to not return promise when caller doesn't expect it

* Add ignores to lsp code

packages/codemirror-lsp-client/src/client/index.ts

@@ -72,6 +72,7 @@ export class LanguageServerClient {
   async initialize() {
     // Start the client in the background.
     this.client.setNotifyFn(this.processNotifications.bind(this))
+    // eslint-disable-next-line @typescript-eslint/no-floating-promises
     this.client.start()
 
     this.ready = true
@@ -195,6 +196,9 @@ export class LanguageServerClient {
   }
 
   private processNotifications(notification: LSP.NotificationMessage) {
-    for (const plugin of this.plugins) plugin.processNotification(notification)
+    for (const plugin of this.plugins) {
+      // eslint-disable-next-line @typescript-eslint/no-floating-promises
+      plugin.processNotification(notification)
+    }
   }
 }