Node 12 test

test/data/google-maps.js

@@ -1,10 +1,10 @@
-import { readFile } from 'fs/promises';
+import { promises as fs } from 'fs';
 
 /** @type {import('./google-maps.json')} */
 export let googleMaps;
 
 export async function loadGoogleMapsData() {
   const path = new URL('./google-maps.json', import.meta.url);
-  googleMaps = JSON.parse(await readFile(path, 'utf8'));
+  googleMaps = JSON.parse(await fs.readFile(path, 'utf8'));
   return googleMaps;
 }

tsconfig.json

@@ -1,5 +1,10 @@
 {
-  "include": ["./src/index.d.ts", "./src/**/*.js", "./test/**/*.js"],
+  "include": [
+    "./src/index.d.ts",
+    "./src/**/*.js",
+    "./test/**/*.js",
+    "./test/**/*.json"
+  ],
   "compilerOptions": {
     "target": "es2018",
     "module": "ES2020",