build: fix animations bundle on postinstall

revert after this fix: angular/angular#15300

Author: sis0k0

Diff for: nativescript-angular/postinstall.js

@@ -1,9 +1,21 @@
 var fs = require("fs");
 var os = require("os");
+var path = require("path");
 var hookHelper = require("./hooks/hook-helper");
 var projectDir = hookHelper.findProjectDir();
 
 if (projectDir) {
+    var bundlePath = path.join(projectDir, "node_modules/@angular/animations/browser/package.json");
+
+    try {
+        var content = require(bundlePath);
+        content.main = "../bundles/animations-browser.umd.js";
+        console.log(content)
+        fs.writeFileSync(bundlePath, JSON.stringify(content), "utf8");
+    } catch(e) {
+        console.error(e.message);
+    }
+
     var hooksDir = hookHelper.getHooksDir(),
         beforeLivesyncHookDir = hookHelper.getBeforeLivesyncHookDir(),
         content = 'module.exports = require("nativescript-angular/hooks/before-livesync");';