Merge pull request #18 from Canner/feature/serve-ioc-container

Feature: refactor to IoC (inverse of control) pattern in serve package.

Commit to rebased.
* feat(serve, core): add validators, route generator, restful route, and api server from api schema
* feat(serve): add data query builder and test cases
* feat(serve): add interface of data source, pagination, and pass to data query builder
* feat(core, serve): add validator loader to load validator according to name.
* feat(core, serve): add logger, refactor validator loader, add built-in middlewares and middleware loader

Commit to refactoring to IoC.
* feat(core, serve): make validator loader by IoC, refactor default module import logistic, add required validator.
* chore(build): add "setupFilesAfterEnv" in jest.config.js, support "extensions" property in test cases
* refactor(core, serve) move data query builder and data source modules to "core" package.
* feat(core): make the data query builder and data source created by IoC container.
* feat(serve): refactor the "serve" package IoC pattern.
* feat(core, serve): fix the load extension module for throwing duplicate properties in multiple modules.

Author: kokokuo

jest.preset.ts

@@ -1,3 +1,3 @@
 const nxPreset = require('@nrwl/jest/preset');
 
-module.exports = { ...nxPreset };
+module.exports = { ...nxPreset, setupFilesAfterEnv: ['../../jest.setup.ts'] };

jest.setup.ts

@@ -0,0 +1,4 @@
+/**
+ * Add reflect-metadata to collect Inversify IoC decorator information when running jest test.
+ */
+import 'reflect-metadata';