use terser and clean-css directly

create a sourcemap as well by default

node_modules/cssstyle/lib/implementedProperties.js

@@ -1,6 +1,6 @@
 'use strict';
 
-// autogenerated - 3/27/2019
+// autogenerated - 7/15/2019
 
 /*
  *

node_modules/cssstyle/lib/properties.js

@@ -1,6 +1,6 @@
 'use strict';
 
-// autogenerated - 3/27/2019
+// autogenerated - 7/15/2019
 
 /*
  *

node_modules/cssstyle/package.json

@@ -1,8 +1,8 @@
 {
   "_from": "cssstyle@^1.1.1",
-  "_id": "cssstyle@1.2.2",
+  "_id": "cssstyle@1.4.0",
   "_inBundle": false,
-  "_integrity": "sha512-43wY3kl1CVQSvL7wUY1qXkxVGkStjpkDmVjiIKX8R97uhajy8Bybay78uOtqvh7Q5GK75dNPfW0geWjE6qQQow==",
+  "_integrity": "sha512-GBrLZYZ4X4x6/QEoBnIrqb8B/f5l4+8me2dkom/j1Gtbxy0kBv6OGzKuAsGM75bkGwGAFkt56Iwg28S3XTZgSA==",
   "_location": "/cssstyle",
   "_phantomChildren": {},
   "_requested": {
@@ -18,8 +18,8 @@
   "_requiredBy": [
     "/jsdom"
   ],
-  "_resolved": "https://registry.npmjs.org/cssstyle/-/cssstyle-1.2.2.tgz",
-  "_shasum": "427ea4d585b18624f6fdbf9de7a2a1a3ba713077",
+  "_resolved": "https://registry.npmjs.org/cssstyle/-/cssstyle-1.4.0.tgz",
+  "_shasum": "9d31328229d3c565c61e586b02041a28fccdccf1",
   "_spec": "cssstyle@^1.1.1",
   "_where": "F:\\projects\\p\\minifyfromhtml\\node_modules\\jsdom",
   "bugs": {
@@ -101,5 +101,5 @@
     "test": "npm run generate && nodeunit tests",
     "test-ci": "npm run lint && npm run test"
   },
-  "version": "1.2.2"
+  "version": "1.4.0"
 }