fix: npm installation error (validatorjs#1697)

fixes validatorjs#1696

Author: rubiin

build-browser.js

@@ -1,34 +1,32 @@
 /* eslint import/no-extraneous-dependencies: 0 */
-import fs from 'fs';
-import { rollup } from 'rollup';
-import babel from 'rollup-plugin-babel';
-import babelPresetEnv from '@babel/preset-env';
-import pkg from './package.json';
+import fs from "fs";
+import { rollup } from "rollup";
+import babel from "rollup-plugin-babel";
+import babelPresetEnv from "@babel/preset-env";
+import pkg from "./package.json";
 
 rollup({
-  entry: 'src/index.js',
+  entry: "src/index.js",
   plugins: [
     babel({
       presets: [[babelPresetEnv, { modules: false }]],
       babelrc: false,
     }),
   ],
-}).then(bundle => (
-  bundle.write({
-    dest: 'validator.js',
-    format: 'umd',
-    moduleName: pkg.name,
-    banner: (
-      `/*!\n${
-        String(fs.readFileSync('./LICENSE'))
-          .trim()
-          .split('\n')
-          .map(l => ` * ${l}`)
-          .join('\n')
-      }\n */`
-    ),
-  })
-)).catch((e) => {
-  process.stderr.write(`${e.message}\n`);
-  process.exit(1);
-});
+})
+  .then((bundle) =>
+    bundle.write({
+      dest: "validator.js",
+      format: "umd",
+      moduleName: pkg.name,
+      banner: `/*!\n${String(fs.readFileSync("./LICENSE"))
+        .trim()
+        .split("\n")
+        .map((l) => ` * ${l}`)
+        .join("\n")}\n */`,
+    })
+  )
+  .catch((e) => {
+    process.stderr.write(`${e.message}\n`);
+    process.exit(1);
+  });

package.json

@@ -48,7 +48,7 @@
     "mocha": "^6.2.3",
     "nyc": "^14.1.0",
     "rimraf": "^3.0.0",
-    "rollup": "^0.43.0",
+    "rollup": "^0.47.0",
     "rollup-plugin-babel": "^4.0.1",
     "uglify-js": "^3.0.19"
   },
@@ -72,4 +72,4 @@
     "node": ">= 0.10"
   },
   "license": "MIT"
-}
+}