feat(deps)!: bump minimum TypeScript to 4.8.4 (#68)

BREAKING CHANGE: TypeScript <4.8.4 is no longer supported.

typescript-eslint v8 [dropped
support](https://typescript-eslint.io/blog/announcing-typescript-eslint-v8/#tooling-breaking-changes)
for TypeScript <4.8.4, and `ts-api-utils` recently did the same in a v2
release. We are mirroring that change.

Author: JasonWeinzierl

package.json

@@ -65,7 +65,7 @@
   "peerDependencies": {
     "eslint": "^8.57.0 || ^9.0.0",
     "rxjs": ">=7.2.0",
-    "typescript": ">=4.7.4"
+    "typescript": ">=4.8.4"
   },
   "peerDependenciesMeta": {
     "rxjs": {

yarn.lock

@@ -2203,7 +2203,7 @@ __metadata:
   peerDependencies:
     eslint: ^8.57.0 || ^9.0.0
     rxjs: ">=7.2.0"
-    typescript: ">=4.7.4"
+    typescript: ">=4.8.4"
   peerDependenciesMeta:
     rxjs:
       optional: true