Added skipLibCheck: true to root tsconfig.json.

`office-ui-fabric-react` sometimes has mismatching types that cause issues at compile time that we can't fix.

Author: Ben Grynhaus

tsconfig.json

@@ -10,6 +10,7 @@
     "typeRoots": ["node_modules/@types"],
     "lib": ["es2017", "dom"],
     "baseUrl": ".",
+    "skipLibCheck": true,
     "paths": {
       "@angular-react/*": ["libs/*"],
       "@angular-react/core": ["libs/core/src/index.ts"],