From 316d1775c6e1ead0cf17968704c6b30f5c8550a7 Mon Sep 17 00:00:00 2001
From: Andrey Sitnik <andrey@sitnik.ru>
Date: Thu, 17 Sep 2020 17:40:39 -0400
Subject: [PATCH 1/4] Add PostCSS 8 plugins support

---
 src/plugins.js | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/src/plugins.js b/src/plugins.js
index 2db59d3..ff22254 100644
--- a/src/plugins.js
+++ b/src/plugins.js
@@ -56,18 +56,23 @@ const plugins = (config, file) => {
 
   if (plugins.length && plugins.length > 0) {
     plugins.forEach((plugin, i) => {
-      if (plugin.postcss) {
-        plugin = plugin.postcss
-      }
-
       if (plugin.default) {
         plugin = plugin.default
       }
 
+      if (plugin.postcss === 1) {
+        plugin = plugin()
+      } else if (plugin.postcss) {
+        plugin = plugin.postcss
+      }
+
       if (
         // eslint-disable-next-line
-        !(typeof plugin === 'object' && Array.isArray(plugin.plugins) ||
-        typeof plugin === 'function')
+        !(
+          (typeof plugin === 'object' && Array.isArray(plugin.plugins)) ||
+          (typeof plugin === 'object' && plugin.postcssPlugin) ||
+          (typeof plugin === 'function')
+        )
       ) {
         throw new TypeError(`Invalid PostCSS Plugin found at: plugins[${i}]\n\n(@${file})`)
       }

From 33433991afae21f0bd52fd78bf0068a301ff5299 Mon Sep 17 00:00:00 2001
From: Andrey Sitnik <andrey@sitnik.ru>
Date: Thu, 17 Sep 2020 17:46:21 -0400
Subject: [PATCH 2/4] Remove old Node.js from Travis CI

---
 .travis.yml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 2fd2861..882dd6c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,9 @@
 language: node_js
 
 node_js:
-  - 'stable'
-  - 'lts/*'
-  - 6
+  - stable
+  - "12"
+  - "10"
 
 script: npm run lint && npm t
 

From 67b3a12a29b9568e6b29659e0a637ac3c26de11c Mon Sep 17 00:00:00 2001
From: Andrey Sitnik <andrey@sitnik.ru>
Date: Thu, 17 Sep 2020 17:48:22 -0400
Subject: [PATCH 3/4] Add PostCSS 8 tests

---
 package.json    | 6 +++---
 src/plugins.js  | 2 +-
 test/js.test.js | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/package.json b/package.json
index def6276..2dd58d0 100644
--- a/package.json
+++ b/package.json
@@ -24,12 +24,12 @@
     "cssnano": "^4.0.0",
     "jest": "^24.0.0",
     "jsdoc-to-markdown": "^5.0.0",
-    "postcss": "^7.0.0",
+    "postcss": "^8.0.5",
     "postcss-import": "^12.0.0",
-    "postcss-nested": "^4.0.0",
+    "postcss-nested": "^5.0.0",
     "standard": "^12.0.0",
     "standard-version": "6.0.0",
-    "sugarss": "^2.0.0"
+    "sugarss": "^3.0.0"
   },
   "keywords": [
     "postcss",
diff --git a/src/plugins.js b/src/plugins.js
index ff22254..9b757b3 100644
--- a/src/plugins.js
+++ b/src/plugins.js
@@ -60,7 +60,7 @@ const plugins = (config, file) => {
         plugin = plugin.default
       }
 
-      if (plugin.postcss === 1) {
+      if (plugin.postcss === true) {
         plugin = plugin()
       } else if (plugin.postcss) {
         plugin = plugin.postcss
diff --git a/test/js.test.js b/test/js.test.js
index bc41972..cf1bb33 100644
--- a/test/js.test.js
+++ b/test/js.test.js
@@ -85,7 +85,7 @@ describe('postcss.config.js - {Array} - Load Config', () => {
 
     expect(config.plugins.length).toEqual(2)
     expect(typeof config.plugins[0]).toBe('function')
-    expect(typeof config.plugins[1]).toBe('function')
+    expect(typeof config.plugins[1]).toBe('object')
 
     expect(config.file)
       .toEqual(path.resolve('test/js/array', 'postcss.config.js'))

From 6a34874bb451788a0afe1fffacecf6dd9c2bc3b9 Mon Sep 17 00:00:00 2001
From: Andrey Sitnik <andrey@sitnik.ru>
Date: Thu, 17 Sep 2020 17:53:10 -0400
Subject: [PATCH 4/4] Update Node.js version on AppVeyor

---
 appveyor.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/appveyor.yml b/appveyor.yml
index d86beb1..093120a 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -19,5 +19,5 @@ test_script:
 environment:
   matrix:
     - nodejs_version: 'stable'
-    - nodejs_version: 'lts'
-    - nodejs_version: '6'
+    - nodejs_version: '12'
+    - nodejs_version: '10'