feat: update rollup and babel

package.json

@@ -6,8 +6,7 @@
   "module": "dist/index.esm.js",
   "browser": "dist/index.umd.js",
   "scripts": {
-    "dev": "rollup -c --watch",
-    "bundle": "rollup -c",
+    "build": "rollup -c",
     "test": "jest"
   },
   "husky": {
@@ -38,39 +37,30 @@
     "dist"
   ],
   "devDependencies": {
-    "@babel/core": "^7.0.0",
+    "@babel/core": "^7.9.6",
     "@babel/plugin-external-helpers": "^7.0.0",
-    "@babel/plugin-proposal-class-properties": "^7.0.0",
-    "@babel/preset-env": "^7.0.0",
-    "@babel/preset-react": "^7.0.0",
-    "babel-core": "^7.0.0-bridge.0",
-    "babel-jest": "^23.4.2",
-    "babel-loader": "^8.0.0",
+    "@babel/plugin-proposal-class-properties": "^7.8.3",
+    "@babel/preset-env": "^7.9.6",
+    "@babel/preset-react": "^7.9.4",
+    "@rollup/plugin-babel": "^5.0.0",
+    "@rollup/plugin-commonjs": "^11.1.0",
+    "@rollup/plugin-node-resolve": "^7.1.3",
+    "@rollup/plugin-replace": "^2.3.2",
     "cross-spawn": "^5.1.0",
-    "css-loader": "^0.28.7",
     "enzyme": "^3.5.0",
     "enzyme-adapter-react-16": "^1.3.1",
     "enzyme-to-json": "^3.3.4",
     "husky": "^1.0.0-rc.14",
     "jest": "^23.5.0",
     "lint-staged": "^7.2.2",
-    "postcss-loader": "^2.0.8",
     "postcss-nested": "^4.1.0",
     "postcss-preset-env": "^5.3.0",
     "prettier": "^1.7.4",
     "react": "^16.5.1",
     "react-dom": "^16.5.1",
     "react-test-renderer": "^16.4.2",
-    "rollup": "^0.66.0",
-    "rollup-plugin-babel": "^4.0.1",
-    "rollup-plugin-commonjs": "^9.1.8",
-    "rollup-plugin-node-globals": "^1.1.0",
-    "rollup-plugin-node-resolve": "^3.4.0",
-    "rollup-plugin-postcss": "^1.6.2",
-    "rollup-plugin-replace": "^2.0.0",
-    "style-loader": "^0.19.0",
-    "webpack": "^3.8.1",
-    "webpack-dev-server": "^2.9.3"
+    "rollup": "^2.8.2",
+    "rollup-plugin-postcss": "^3.1.1"
   },
   "dependencies": {
     "classnames": "^2.2.6",

rollup.config.js

@@ -1,22 +1,12 @@
-import rollup from "rollup";
-import babel from "rollup-plugin-babel";
+import babel from "@rollup/plugin-babel";
 import postcss from "rollup-plugin-postcss";
 import postcssPresetEnv from "postcss-preset-env";
 import postcssNested from "postcss-nested";
-import resolve from "rollup-plugin-node-resolve";
-import commonjs from "rollup-plugin-commonjs";
-import replace from "rollup-plugin-replace";
-import spawn from "cross-spawn";
+import resolve from "@rollup/plugin-node-resolve";
+import commonjs from "@rollup/plugin-commonjs";
+import replace from "@rollup/plugin-replace";
 import pkg from "./package.json";
 
-const watcher = rollup.watch({});
-
-watcher.on("event", event => {
-  if (event.code === "START") {
-    spawn("webpack-dev-server", { stdio: "inherit" });
-  }
-});
-
 const babelOptions = {
   babelrc: false,
   exclude: "node_modules/**",
@@ -29,7 +19,8 @@ const babelOptions = {
     ],
     "@babel/react"
   ],
-  plugins: ["@babel/proposal-class-properties"]
+  plugins: ["@babel/proposal-class-properties"],
+  exclude: "node_modules/**"
 };
 
 const postcssOptions = {