TypeScript 4

package-lock.json

@@ -48,7 +48,7 @@
         "source-map-support": "^0.5.21",
         "tiny-glob": "^0.2.9",
         "tslib": "^2.5.0",
-        "typescript": "^3.7.5",
+        "typescript": "^4.9.3",
         "util": "^0.12.5"
       },
       "engines": {
@@ -5043,9 +5043,9 @@
       "dev": true
     },
     "node_modules/typescript": {
-      "version": "3.9.10",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.10.tgz",
-      "integrity": "sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q==",
+      "version": "4.9.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
       "dev": true,
       "bin": {
         "tsc": "bin/tsc",
@@ -9216,9 +9216,9 @@
       "dev": true
     },
     "typescript": {
-      "version": "3.9.10",
-      "resolved": "https://registry.npmjs.org/typescript/-/typescript-3.9.10.tgz",
-      "integrity": "sha512-w6fIxVE/H1PkLKcCPsFqKE7Kv7QUwhU8qQY2MueZXWx5cPZdwFupLgKK3vntcK98BtNHZtAF4LA/yl2a7k8R6Q==",
+      "version": "4.9.5",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-4.9.5.tgz",
+      "integrity": "sha512-1FXk9E2Hm+QzZQ7z+McJiHL4NW1F2EzMu9Nq9i3zAaGqibafqYwCVU6WyWAuyQRRzOlxou8xZSyXLEN8oKj24g==",
       "dev": true
     },
     "unbox-primitive": {

package.json

@@ -158,7 +158,7 @@
     "source-map-support": "^0.5.21",
     "tiny-glob": "^0.2.9",
     "tslib": "^2.5.0",
-    "typescript": "^3.7.5",
+    "typescript": "^4.9.3",
     "util": "^0.12.5"
   }
 }

src/compiler/compile/Component.ts

@@ -1,5 +1,3 @@
-// TODO: remove after https://github.com/jridgewell/trace-mapping/pull/24 has been merged
-// @ts-expect-error Svelte 3's ancient TS version can't look up the types for this package properly yet
 import { TraceMap, originalPositionFor } from '@jridgewell/trace-mapping';
 import { walk } from 'estree-walker';
 import { getLocator } from 'locate-character';