Update rollup-plugin-postcss (#1402)

Author: RobbieTheWagner

package.json

@@ -59,7 +59,7 @@
     "@babel/preset-env": "^7.13.12",
     "@testing-library/jest-dom": "^5.11.10",
     "@testing-library/svelte": "^3.0.3",
-    "autoprefixer": "^9.8.6",
+    "autoprefixer": "^10.2.5",
     "babel-core": "^7.0.0-bridge.0",
     "babel-jest": "^26.6.3",
     "babel-plugin-transform-es2015-modules-commonjs": "^6.26.2",
@@ -81,7 +81,7 @@
     "jsdoc": "^3.6.6",
     "jsdoc-template-ship-shape": "^0.1.1",
     "mutationobserver-shim": "^0.3.7",
-    "postcss": "^7.0.35",
+    "postcss": "^8.2.9",
     "postinstall-postinstall": "^2.1.0",
     "prettier": "^2.2.1",
     "release-it": "^14.5.1",
@@ -97,7 +97,7 @@
     "rollup-plugin-livereload": "^2.0.0",
     "rollup-plugin-multi-entry": "^2.1.0",
     "rollup-plugin-node-resolve": "^5.2.0",
-    "rollup-plugin-postcss": "^2.9.0",
+    "rollup-plugin-postcss": "^4.0.0",
     "rollup-plugin-replace": "^2.2.0",
     "rollup-plugin-scss": "^2.6.1",
     "rollup-plugin-serve": "^1.1.0",

rollup.config.js

@@ -38,7 +38,7 @@ const plugins = [
       require('autoprefixer'),
       require('cssnano')
     ],
-    extract: 'dist/css/shepherd.css'
+    extract: 'css/shepherd.css'
   })
 ];
 
@@ -59,13 +59,15 @@ const rollupBuilds = [
 
     output: [
       {
-        file: pkg.main,
+        dir: 'dist',
+        entryFileNames: 'js/[name].js',
         format: 'umd',
         name: 'Shepherd',
         sourcemap: true
       },
       {
-        file: pkg.module,
+        dir: 'dist',
+        entryFileNames: 'js/[name].esm.js',
         format: 'esm',
         sourcemap: true
       }
@@ -81,13 +83,15 @@ if (!process.env.DEVELOPMENT) {
       input: './src/js/shepherd.js',
       output: [
         {
-          file: 'dist/js/shepherd.min.js',
+          dir: 'dist',
+          entryFileNames: 'js/[name].min.js',
           format: 'umd',
           name: 'Shepherd',
           sourcemap: true
         },
         {
-          file: 'dist/js/shepherd.esm.min.js',
+          dir: 'dist',
+          entryFileNames: 'js/[name].esm.min.js',
           format: 'esm',
           sourcemap: true
         }
@@ -109,7 +113,7 @@ if (!process.env.DEVELOPMENT) {
         }),
         postcss({
           plugins: [require('autoprefixer'), require('cssnano')],
-          extract: 'dist/css/shepherd.css'
+          extract: 'css/shepherd.css'
         }),
         compiler(),
         license({