update dev dependencies ava, eslint, eslint-plugin-ava and migrate to ES modules

gulpfile.cjs

@@ -0,0 +1,49 @@
+/* eslint-disable no-undef */
+const { dest, src } = require('gulp')
+
+const replace = require('gulp-replace')
+
+const PACKAGE = require('./package.json')
+
+const FOLDER_BUILD = './build'
+
+function injectMetadata() {
+  return src(
+    [
+      FOLDER_BUILD + '/front/events-loader.js',
+      FOLDER_BUILD + '/' + PACKAGE.name + '.php',
+      FOLDER_BUILD + '/includes/constants.php',
+      FOLDER_BUILD + '/readme.txt',
+    ],
+    { base: './' }
+  )
+    .pipe(replace('<wordpress-author-name>', PACKAGE.author.name))
+    .pipe(replace('<wordpress-author-url>', PACKAGE.author.url))
+    .pipe(replace('<wordpress-description>', PACKAGE.description))
+    .pipe(replace('<wordpress-donation-link>', PACKAGE.funding.url))
+    .pipe(replace('<wordpress-license>', PACKAGE.license))
+    .pipe(
+      replace(
+        '<wordpress-minimum-version>',
+        PACKAGE.additionalDetails.wordpressMinimumVersion
+      )
+    )
+    .pipe(replace('<wordpress-name>', PACKAGE.name))
+    .pipe(replace('<wordpress-nice-name>', PACKAGE.additionalDetails.niceName))
+    .pipe(
+      replace(
+        '<wordpress-php-minimum-version>',
+        PACKAGE.additionalDetails.phpMinimumVersion
+      )
+    )
+    .pipe(
+      replace(
+        '<wordpress-tested-up-to-version>',
+        PACKAGE.additionalDetails.wordpressTestedUpToVersion
+      )
+    )
+    .pipe(replace('<wordpress-version>', PACKAGE.version))
+    .pipe(dest('.'))
+}
+
+exports.inject = injectMetadata