chore(package): remove unused libraries: shelljs, shx

Author: christopherthielen

package.json

@@ -88,8 +88,6 @@
     "rollup-plugin-uglify": "^3.0.0",
     "rxjs": "^6.1.0",
     "rxjs-compat": "^6.1.0",
-    "shelljs": "^0.8.1",
-    "shx": "^0.2.2",
     "ts-loader": "^3.5.0",
     "tslib": "^1.9.0",
     "tslint": "^5.9.1",