Update npm packages and latest version of Tailwind

gulpfile.babel.js

@@ -10,7 +10,7 @@ import tailwindcss from "tailwindcss";
 
 const mainStylesheet = "src/style.css"; /* Main stylesheet (pre-build) */
 const siteRoot = "_site";
-const tailwindConfig = "tailwind.js"; /* Tailwind config */
+const tailwindConfig = "tailwind.config.js"; /* Tailwind config */
 
 /**
  * Fix Windows compatibility issue

package.json

@@ -12,9 +12,8 @@
     "gulp-clean-css": "^3.9.3",
     "gulp-postcss": "^7.0.0",
     "gulp-purgecss": "^0.20.0",
-    "gulp-util": "^3.0.8",
     "postcss-import": "^11.1.0",
-    "tailwindcss": "^0.6.4"
+    "tailwindcss": "^0.6.5"
   },
   "scripts": {
     "build": "gulp css",