Add rollup-plugin-postcss

package_template.json

@@ -38,6 +38,7 @@
         "@rollup/plugin-node-resolve": "^8.0.0",
         "@rollup/plugin-replace": "^2.2.0",
         "rollup": "^2.3.4",
+        "rollup-plugin-postcss": "^3.1.8",
         "rollup-plugin-svelte": "^6.0.0",
         "rollup-plugin-terser": "^7.0.0"
       }

rollup.config.js

@@ -1,8 +1,9 @@
+import babel from '@rollup/plugin-babel';
+import commonjs from '@rollup/plugin-commonjs';
+import postcss from 'rollup-plugin-postcss'
 import resolve from '@rollup/plugin-node-resolve';
 import replace from '@rollup/plugin-replace';
-import commonjs from '@rollup/plugin-commonjs';
 import svelte from 'rollup-plugin-svelte';
-import babel from '@rollup/plugin-babel';
 import { terser } from 'rollup-plugin-terser';
 import config from 'sapper/config/rollup.js';
 import pkg from './package.json';
@@ -28,8 +29,10 @@ export default {
 			svelte({
 				dev,
 				hydratable: true,
-				emitCss: true
+				emitCss: false,
+				css: true
 			}),
+			postcss(),
 			resolve({
 				browser: true,
 				dedupe: ['svelte']