Merge pull request #231 from pravi/update-rollup-plugin-babel

Switch to @rollup/plugin-babel (rollup-plugin-babel is deprecated)

Author: jamuhl

package-lock.json

@@ -39,7 +39,7 @@
     "mocha": "7.1.2",
     "rimraf": "2.6.3",
     "rollup": "^2.34.1",
-    "rollup-plugin-babel": "^4.3.3",
+    "@rollup/plugin-babel": "^5.2.2",
     "@rollup/plugin-node-resolve": "^11.0.0",
     "rollup-plugin-terser": "^5.1.1",
     "tslint": "^5.18.0",

package.json

@@ -1,11 +1,11 @@
-import babel from 'rollup-plugin-babel';
+import babel from '@rollup/plugin-babel';
 import nodeResolve from '@rollup/plugin-node-resolve';
 import { terser } from 'rollup-plugin-terser';
 import pkg from './package.json';
 
 const getBabelOptions = ({ useESModules }) => ({
   exclude: /node_modules/,
-  runtimeHelpers: true,
+  babelHelpers: 'runtime',
   plugins: [
     ['@babel/transform-runtime', { useESModules }]
   ]