fix(webpack): use typeRoots to avoid TS typing issue when cssnano and protractor are selected

cssnano and protractor load different version of @types/q which confused TypeScript. It's likely only confusing ts-loader because only webpack app is affected, not cli-bundler app.
Setting typeRoots is not flexible in lerna hoisting environment, that's why we did not turn it globally for webpack+TypeScript app.

closes #1090

Author: 3cp

skeleton/common/tsconfig.json__if_typescript

@@ -32,6 +32,10 @@
     "types": ["node", "jest"],
     // @endif
 
+    // @if feat.webpack && feat['postcss-typical'] && feat.protractor
+    "typeRoots": ["./node_modules/@types"],
+    // @endif
+
     "removeComments": true,
     "emitDecoratorMetadata": true,
     "experimentalDecorators": true,