Node compatibility set to >=12.0

.travis.yml

@@ -1,7 +1,8 @@
 language: node_js
 sudo: false
 node_js:
-  - "8.9"
+  - "12.18"
+  - "14.7"
 env:
   - CXX=g++-4.8
 addons:

lib/tools/redownload/gzipCompressor.js

@@ -58,7 +58,7 @@ var GzipCompressor = function() {
 
             var uncompressedSize = entry.weightCheck.optimized;
 
-            zlib.gzip(new Buffer(entry.weightCheck.bodyAfterOptimization, 'utf8'), function(err, buffer) {
+            zlib.gzip(Buffer.from(entry.weightCheck.bodyAfterOptimization, 'utf8'), function(err, buffer) {
                 if (err) {
                     debug('Could not compress minified file with gzip');
                     debug(err);

package.json

@@ -16,7 +16,7 @@
     "yellowlabtools": "./bin/cli.js"
   },
   "engines": {
-    "node": ">= 8.0"
+    "node": ">= 12.0"
   },
   "main": "./lib/index.js",
   "dependencies": {