message: Use const / let instead of var
diff: #!/usr/bin/env node
  -var fs = require('fs');
  -var path = require('path');
  -var glob = require('glob');
  -var args = require('minimist')(process.argv);
  -var chokidar = require('chokidar');
  +const fs = require('fs');
  +const path = require('path');
  +const glob = require('glob');
  +const args = require('minimist')(process.argv);
  +const chokidar = require('chokidar');
  -var componentIndex = path.join('src', 'component-index.js');
  -var componentIndexTmp = componentIndex+".tmp";
  -var componentsDir = path.join('src', 'components');
  -var componentJsGlob = '**/*.js';
  -var componentTsGlob = '**/*.tsx';
  -var prevFiles = [];
  +const componentIndex = path.join('src', 'component-index.js');
  +const componentIndexTmp = componentIndex+".tmp";
  +const componentsDir = path.join('src', 'components');
  +const componentJsGlob = '**/*.js';
  +const componentTsGlob = '**/*.tsx';
  +let prevFiles = [];
  function reskindex() {
  - var jsFiles = glob.sync(componentJsGlob, {cwd: componentsDir}).sort();
  - var tsFiles = glob.sync(componentTsGlob, {cwd: componentsDir}).sort();
  - var files = [...tsFiles, ...jsFiles];
  + const jsFiles = glob.sync(componentJsGlob, {cwd: componentsDir}).sort();
  + const tsFiles = glob.sync(componentTsGlob, {cwd: componentsDir}).sort();
  + const files = [...tsFiles, ...jsFiles];
  if (!filesHaveChanged(files, prevFiles)) {
  return;
  }
  prevFiles = files;
  - var header = args.h || args.header;
  + const header = args.h || args.header;
  - var strm = fs.createWriteStream(componentIndexTmp);
  + const strm = fs.createWriteStream(componentIndexTmp);
  if (header) {
  strm.write(fs.readFileSync(header));
  @@ -38,11 +38,11 @@ function reskindex() {
  strm.write(" */\n\n");
  strm.write("let components = {};\n");
  - for (var i = 0; i < files.length; ++i) {
  - var file = files[i].replace('.js', '').replace('.tsx', '');
  + for (let i = 0; i < files.length; ++i) {
  + const file = files[i].replace('.js', '').replace('.tsx', '');
  - var moduleName = (file.replace(/\//g, '.'));
  - var importName = moduleName.replace(/\./g, "$");
  + const moduleName = (file.replace(/\//g, '.'));
  + const importName = moduleName.replace(/\./g, "$");
  strm.write("import " + importName + " from './components/" + file + "';\n");
  strm.write(importName + " && (components['"+moduleName+"'] = " + importName + ");");
  @@ -67,7 +67,7 @@ function filesHaveChanged(files, prevFiles) {
  return true;
  }
  // Check for name changes
  - for (var i = 0; i < files.length; i++) {
  + for (const i = 0; i < files.length; i++) {
  if (prevFiles[i] !== files[i]) {
  return true;
  }
  @@ -81,7 +81,7 @@ if (!args.w) {
  return;
  }
  -var watchDebouncer = null;
  +let watchDebouncer = null;
  chokidar.watch(path.join(componentsDir, componentJsGlob)).on('all', (event, path) => {
  if (path === componentIndex) return;
  if (watchDebouncer) clearTimeout(watchDebouncer);
  