chore: update imports in rollup config

Author: alioguzhan

rollup.config.js

@@ -1,8 +1,8 @@
-import commonjs from 'rollup-plugin-commonjs';
-import json from 'rollup-plugin-json';
-import resolve from 'rollup-plugin-node-resolve';
-import postcss from 'rollup-plugin-postcss';
+import commonjs from '@rollup/plugin-commonjs';
+import json from '@rollup/plugin-json';
+import resolve from '@rollup/plugin-node-resolve';
 import external from 'rollup-plugin-peer-deps-external';
+import postcss from 'rollup-plugin-postcss';
 import sourceMaps from 'rollup-plugin-sourcemaps';
 import { terser } from 'rollup-plugin-terser';
 import typescript from 'rollup-plugin-typescript2';