message: serial iteration instead of parallel
  hopefully it's not too slow
diff: @@ -5,9 +5,6 @@ const { exec } = require("child_process");
  const { file } = require("tmp-promise");
  const { writeFile } = require("fs-extra");
  const toneJson = require("../../docs/tone.json");
  -const eachLimit = require("async/eachLimit");
  -const os = require("os");
  -const cpuCount = os.cpus().length;
  /**
  * Get all of the examples
  @@ -75,7 +72,8 @@ async function testExampleString(str) {
  async function main() {
  const examples = findExamples(toneJson);
  let passed = 0;
  - await eachLimit(examples, cpuCount, async (example) => {
  + for (let i = 0; i < examples.length; i++) {
  + const example = examples[i];
  try {
  await testExampleString(example);
  passed++;
  @@ -89,7 +87,7 @@ async function main() {
  console.log(example + "\n" + e);
  throw e;
  }
  - });
  + }
  console.log(`\nvalid examples ${passed}/${examples.length}`);
  if (passed !== examples.length) {
  throw new Error("didn't pass all tests");
  