Add support for angular9

[xiaotupansy]

version:1.0.9
angular:9.1.0

Parser works for angular8.
But after upgrading angular to 9, I got an error message :

ERROR in ../node_modules/angular2parse/src/module.d.ts:3:22 - error NG6002: Appears in the NgModule.imports of AppModule, but could not be resolved to an NgModule class.

This likely means that the library (angular2parse) which declares Angular2ParseModule has not been processed correctly by ngcc, or is not compatible with Angular Ivy. Check if a newer version of the library is available, and update if so. Also consider checking with the library's authors to see if the library is expected to be compatible with Ivy.