Check types during npm test, run in parallel

This change should have no user impact. It:

- Checks types when running tests.
- Runs all test scripts, such as linting and type checking, in parallel.

Author: EvanHahn

package-lock.json

@@ -14,6 +14,7 @@
     "globals": "^15.9.0",
     "jest": "^29.7.0",
     "node-zopfli": "^2.1.4",
+    "npm-run-all2": "^7.0.2",
     "prettier": "^3.3.3",
     "rollup": "^4.22.5",
     "rollup-plugin-dts": "^6.1.1",
@@ -24,14 +25,14 @@
     "typescript-eslint": "^8.7.0"
   },
   "scripts": {
-    "pretest": "npm run lint",
-    "lint": "npm run lint:eslint && npm run lint:prettier",
-    "lint:eslint": "eslint --cache .",
-    "lint:prettier": "prettier --check .",
+    "test:eslint": "eslint --cache .",
+    "test:jest": "jest",
+    "test:prettier": "prettier --check .",
+    "test:typescript": "tsc --noEmit",
     "format": "prettier --write .",
     "clean": "node ./bin/clean.mjs",
     "build": "tsx ./build/build-package.ts",
-    "test": "jest"
+    "test": "run-p --aggregate-output test:*"
   },
   "type": "module",
   "engines": {