Use minify instead of minifier

package.json

@@ -8,7 +8,8 @@
         "compile": "stylus stylus/theme.styl -o build/kernel.css --prefix ke- --include-css",
         "watch": "stylus -w stylus/theme.styl -o build/kernel.css --prefix ke- --include-css",
         "lint": "stylint stylus",
-        "release": "npm run compile && node ./scripts/release.js"
+        "release": "npm run compile && node ./scripts/release.js && npm run minify",
+        "minify": "minify ./build/kernel.css > ./release/kernel.min.css && minify ./js/kernel.js > ./release/kernel.min.js"
     },
     "repository": {
         "type": "git",
@@ -26,8 +27,8 @@
     },
     "homepage": "https://github.com/Ionogy/kernel.css#readme",
     "dependencies": {
+        "minify": "^8.0.4",
         "stylint": "^2.0.0",
-        "stylus": "^0.56.0",
-        "minifier": "^0.8.1"
+        "stylus": "^0.56.0"
     }
 }

scripts/release.js

@@ -1,16 +1,10 @@
 "use strict";
 
 const fs = require('fs');
-const minifier = require('minifier');
 
 if (!fs.existsSync('./release')) {
 	fs.mkdirSync('./release');
 }
 
-minifier.on('error', (err) => {
-	console.error(err);
-});
-
-minifier.minify('./build/kernel.css', {output: './release/kernel.min.css'});
 fs.createReadStream('./build/kernel.css').pipe(fs.createWriteStream('./release/kernel.css'));
 fs.createReadStream('./js/kernel.js').pipe(fs.createWriteStream('./release/kernel.js'));