Update build target; minified JS.

Author: joedolson

package.json

@@ -34,8 +34,8 @@
   },
   "scripts": {
     "presetup": "find .scripts -type f -exec chmod +x {} \\;",
-    "start": "esbuild admin.min=src/assets/js/admin.js media.min=src/assets/js/media.js --bundle --outdir=src/assets/js --target=chrome58,firefox57,safari11,edge18 --watch --sourcemap",
-    "build:js": "esbuild admin.min=src/assets/js/admin.js media.min=src/assets/js/media.js --bundle --outdir=src/assets/js --target=chrome58,firefox57,safari11,edge18 --minify",
+    "start": "esbuild admin.min=src/assets/js/admin.js media.min=src/assets/js/media.js --bundle --outdir=src/assets/js --target=es2020 --watch --sourcemap",
+    "build:js": "esbuild admin.min=src/assets/js/admin.js media.min=src/assets/js/media.js --bundle --outdir=src/assets/js --target=es2020 --minify",
     "build:docs": "rm -rf docs/ && jsdoc -c hookdoc-conf.json",
     "format-php": "wp-env run composer run-script format",
     "prelint-php": "wp-env run composer 'install --no-interaction'",