run tests with drone

.drone.yml

   commands:
   - npm run build
 
+- name: npm run test
+  image: node:12
+  commands:
+  - npm run test
+
 - name: npm publish
   image: plugins/npm
   settings:

index.ts

-import * as Back from './src/backend/RPCSocketServer';
-import * as Front from './src/frontend/RPCSocket';
-
-export {
-    Back as Backend,
-    Front as Frontend
-}