message: Add tsconfigRootDir to .eslintrc.js
  I got the error "Parsing error: Cannot read file
  '.../tsconfig.json'.eslint" when I edit in this repository with neovim +
  coc. Adding the `tsconfigRootDir` solved this issue.
  See also
diff: @@ -18,6 +18,7 @@ module.exports = {
  parser: '@typescript-eslint/parser',
  parserOptions: {
  project: ['tsconfig.json', 'tsconfig.eslint.json'],
  + tsconfigRootDir: __dirname,
  },
  plugins: [
  '@typescript-eslint',
  