Enable TS strict mode in all templates and generally clean up TS references

templates/AngularSpa/tsconfig.json

@@ -1,11 +1,14 @@
 {
   "compilerOptions": {
+    "module": "es2015",
     "moduleResolution": "node",
     "target": "es5",
     "sourceMap": true,
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
     "skipDefaultLibCheck": true,
+    "skipLibCheck": true, // Workaround for https://github.com/angular/angular/issues/17863. Remove this if you upgrade to a fixed version of Angular.
+    "strict": true,
     "lib": [ "es6", "dom" ],
     "types": [ "webpack-env" ]
   },