Merge pull request #162 from m4thieulavoie/chore/postcss-major-bump

chore: bump postcss version to 8

.travis.yml

@@ -1,7 +1,8 @@
 sudo: false
 language: node_js
 node_js:
-  - stable
-  - 6
+  - node
+  - "12"
+  - "10"
 after_success:
   - "npm run coveralls"

README.md

@@ -8,7 +8,7 @@ several plugins, but parse CSS only once.
 
 ## Install
 
-    $ npm install --save-dev gulp-postcss
+    $ npm install --save-dev postcss gulp-postcss
 
 Install required [postcss plugins](https://www.npmjs.com/browse/keyword/postcss-plugin) separately. E.g. for autoprefixer, you need to install [autoprefixer](https://github.com/postcss/autoprefixer) package.
 

package.json

@@ -17,7 +17,7 @@
   "description": "PostCSS gulp plugin",
   "main": "index.js",
   "engines": {
-    "node": ">=6"
+    "node": "^10 || ^12 || >=14"
   },
   "scripts": {
     "coveralls": "coveralls < coverage/lcov.info",
@@ -43,8 +43,7 @@
   "dependencies": {
     "fancy-log": "^1.3.3",
     "plugin-error": "^1.0.1",
-    "postcss": "^7.0.14",
-    "postcss-load-config": "^2.0.0",
+    "postcss-load-config": "^2.1.1",
     "vinyl-sourcemaps-apply": "^0.2.1"
   },
   "devDependencies": {
@@ -53,8 +52,12 @@
     "gulp-sourcemaps": "^2.6.5",
     "mocha": "^5.2.0",
     "nyc": "^12.0.2",
+    "postcss": "^8.0.0",
     "proxyquire": "^2.1.0",
     "sinon": "^6.3.5",
     "vinyl": "^2.2.0"
+  },
+  "peerDependencies": {
+    "postcss": "^8.0.0"
   }
 }