use terser and clean-css directly

create a sourcemap as well by default

node_modules/cssom/package.json

@@ -1,8 +1,8 @@
 {
   "_from": "cssom@^0.3.4",
-  "_id": "cssom@0.3.6",
+  "_id": "cssom@0.3.8",
   "_inBundle": false,
-  "_integrity": "sha512-DtUeseGk9/GBW0hl0vVPpU22iHL6YB5BUX7ml1hB+GMpo0NX5G4voX3kdWiMSEguFtcW3Vh3djqNF4aIe6ne0A==",
+  "_integrity": "sha512-b0tGHbfegbhPJpxpiBPU2sCkigAqtM9O121le6bbOlgyV+NyGyCmVfJ6QW9eRjz8CpNfWEOYBIMIGRYkLwsIYg==",
   "_location": "/cssom",
   "_phantomChildren": {},
   "_requested": {
@@ -19,8 +19,8 @@
     "/cssstyle",
     "/jsdom"
   ],
-  "_resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.6.tgz",
-  "_shasum": "f85206cee04efa841f3c5982a74ba96ab20d65ad",
+  "_resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.8.tgz",
+  "_shasum": "9f1276f5b2b463f2114d3f2c75250af8c1a36f4a",
   "_spec": "cssom@^0.3.4",
   "_where": "F:\\projects\\p\\minifyfromhtml\\node_modules\\jsdom",
   "author": {
@@ -33,9 +33,6 @@
   "bundleDependencies": false,
   "deprecated": false,
   "description": "CSS Object Model implementation and CSS parser",
-  "devDependencies": {
-    "jake": "~0.7.3"
-  },
   "files": [
     "lib/"
   ],
@@ -53,8 +50,5 @@
     "type": "git",
     "url": "git+https://github.com/NV/CSSOM.git"
   },
-  "scripts": {
-    "prepublish": "jake lib/index.js"
-  },
-  "version": "0.3.6"
+  "version": "0.3.8"
 }