Enable erasableSyntaxOnly in TypeScript config

Adds the 'erasableSyntaxOnly' option to the base tsconfig to restrict type erasure to erasable syntax only.

Author: steida

packages/common/test/Type.test.ts

@@ -2442,7 +2442,10 @@ test("omit - single key", () => {
 
 test("instanceOf", () => {
   class User {
-    constructor(public name: string) {}
+    name: string;
+    constructor(name: string) {
+      this.name = name;
+    }
   }
 
   class Admin extends User {}

packages/tsconfig/base.json

@@ -16,7 +16,8 @@
     "skipLibCheck": true,
     "strict": true,
     "exactOptionalPropertyTypes": true,
-    "noErrorTruncation": false
+    "noErrorTruncation": false,
+    "erasableSyntaxOnly": true
   },
   "exclude": ["node_modules"]
 }

packages/web/test/SharedWebWorker.test.ts

@@ -9,8 +9,11 @@ import { SimpleName, wait } from "@evolu/common";
 // Mock BroadcastChannel
 class MockBroadcastChannel {
   onmessage: ((event: MessageEvent) => void) | null = null;
+  name: string;
 
-  constructor(public name: string) {}
+  constructor(name: string) {
+    this.name = name;
+  }
 
   postMessage = vi.fn();
   close = vi.fn();