Function replaceInFile

tools/release.ts:89–96

(
  file: string,
  replacer: (content: string) => string,
)

) as DenoJson;

async function replaceInFile(
  file: string,
  replacer: (content: string) => string,
) {
  const raw = await Deno.readTextFile(file);
  const replaced = replacer(raw);
  await Deno.writeTextFile(file, replaced);
}

const nextVersion = semver.format(next);