Commut rollup.native.js and add built files to .gitignore

Author: blazzy

.gitignore

@@ -12,3 +12,5 @@ amplitude.min.js
 amplitude.nocompat.js
 amplitude.nocompat.min.js
 amplitude-snippet.min.js
+amplitude.native.js
+.watchmanconfig

rollup.native.js

@@ -0,0 +1,31 @@
+import resolve from 'rollup-plugin-node-resolve';
+import commonjs from 'rollup-plugin-commonjs';
+import replace from 'rollup-plugin-replace';
+import babel from 'rollup-plugin-babel';
+import json from 'rollup-plugin-json';
+
+export default {
+  input: 'src/index.js',
+  output: {
+    name: 'amplitude',
+    file: 'amplitude.native.js',
+    format: 'umd',
+  },
+  plugins: [
+    json(),
+    babel({
+      exclude: 'node_modules/**',
+      plugins: ['@babel/plugin-proposal-object-rest-spread'],
+    }),
+    resolve({
+      browser: true,
+    }),
+    replace({
+      BUILD_COMPAT_SNIPPET: 'false',
+      BUILD_COMPAT_2_0: 'true',
+      BUILD_COMPAT_LOCAL_STORAGE: 'true',
+      BUILD_COMPAT_REACT_NATIVE: 'true',
+    }),
+    commonjs(),
+  ],
+};