feat!: bump minimum Node version to 18.12 and TypeScript to 4.8.4 (#531)

## PR Checklist

- [x] Addresses an existing open issue: fixes #530; fixes #532; closes
#580
- [x] That issue was marked as [`status: accepting
prs`](https://github.com/JoshuaKGoldberg/ts-api-utils/issues?q=is%3Aopen+is%3Aissue+label%3A%22status%3A+accepting+prs%22)
- [x] Steps in
[CONTRIBUTING.md](https://github.com/JoshuaKGoldberg/ts-api-utils/blob/main/.github/CONTRIBUTING.md)
were taken

## Overview

Removes the following methods that rely on deprecated parts of
TypeScript:

* `isInputFiles` (`ts.SyntaxKind.InputFiles`)
* `isUnparsedPrologue` (`ts.SyntaxKind.UnparsedPrologue`)
* `isUnparsedSourceText` (`ts.isUnparsedPrepend`,
`ts.isUnparsedTextLike`)
* `isUnparsedSyntheticReference` (`ts.SyntaxKind.
UnparsedSyntheticReference`)

Also bumps all devDependencies to latest (`ncu -u`) to work on the
latest Node 22 and 23 in CI.

💖

---------

Co-authored-by: Rebecca Stevens <rebecca.stevens@outlook.co.nz>

Author: JoshuaKGoldberg

.eslintrc.cjs

@@ -3,9 +3,9 @@ description: Prepares the repo for a typical CI job
 inputs:
   node-version:
     default: latest
-
     description: The node version to use
     required: false
+
 name: Prepare
 
 runs:

.github/actions/prepare/action.yml

@@ -11,9 +11,8 @@ runs:
       uses: actions/github-script@v7.0.1
       with:
         github-token: ${{ inputs.ACCESS_TOKEN }}
-        # Note: keep this inline script in sync with script/setup.js!
         # Todo: it would be nice to not have two sources of truth...
-        # https://github.com/JoshuaKGoldberg/template-typescript-node-package/issues/145
+        # https://github.com/JoshuaKGoldberg/create-typescript-app/issues/145
         script: |
           github.request(
             `PUT /repos/JoshuaKGoldberg/ts-api-utils/branches/main/protection`,
@@ -32,8 +31,9 @@ runs:
               required_pull_request_reviews: null,
               required_status_checks: {
                 checks: [
-                  { context: "build (16.14.0)" },
                   { context: "build (18.x)" },
+                  { context: "build (22.x)" },
+                  { context: "build (latest)" },
                   { context: "compliance" },
                   { context: "lint_docs" },
                   { context: "lint_knip_production" },
@@ -43,14 +43,12 @@ runs:
                   { context: "lint_spelling" },
                   { context: "lint" },
                   { context: "prettier" },
-                  { context: "test (16.14.0, 4.3.5)" },
-                  { context: "test (16.14.0, 4.6.4)" },
-                  { context: "test (16.14.0, 4.9.5)" },
-                  { context: "test (16.14.0, latest)" },
-                  { context: "test (18.x, 4.3.5)" },
-                  { context: "test (18.x, 4.6.4)" },
-                  { context: "test (18.x, 4.9.5)" },
+                  { context: "test (18.x, 4.8.4)" },
                   { context: "test (18.x, latest)" },
+                  { context: "test (22.x, 4.8.4)" },
+                  { context: "test (22.x, latest)" },
+                  { context: "test (latest, 4.8.4)" },
+                  { context: "test (latest, latest)" },
                   { context: "type_check" },
                 ],
                 strict: false,

.github/actions/protect-main/action.yml

@@ -1,18 +1,9 @@
 {
 	"$schema": "https://docs.renovatebot.com/renovate-schema.json",
 	"automerge": true,
+	"extends": ["helpers:disableTypesNodeMajor"],
 	"internalChecksFilter": "strict",
 	"labels": ["dependencies"],
 	"minimumReleaseAge": "3 days",
-	"packageRules": [
-		{
-			"allowedVersions": "<0.25",
-			"matchPackageNames": ["typedoc"]
-		},
-		{
-			"allowedVersions": "<5.5",
-			"matchPackageNames": ["typescript"]
-		}
-	],
 	"postUpdateOptions": ["pnpmDedupe"]
 }

.github/renovate.json

@@ -13,8 +13,9 @@ jobs:
       fail-fast: false
       matrix:
         node_version:
-          - 16.14.0
           - 18.x
+          - 22.x
+          - latest
 name: Build
 
 on: