Replace Lusca definition file with @types/lusca

Thanks!

README.md

@@ -197,9 +197,9 @@ In the `tsconfig.json` for this project you'll see the following:
 This tells the TypeScript compiler that in addition to looking in `node_modules/@types` for every import (`*`) also look in our own `.d.ts` file location `<baseUrl>` + `src/types/*`.
 So when we write something like: 
 ```ts
-import * as lusca from "lusca";
+import * as flash from "express-flash";
 ```
-First the compiler will look for a `d.ts` file in `node_modules/@types` and then when it doesn't find one look in `src/types` and find our file `lusca.d.ts`.
+First the compiler will look for a `d.ts` file in `node_modules/@types` and then when it doesn't find one look in `src/types` and find our file `express-flash.d.ts`.
 
 #### Using `dts-gen`
 Unless you are familiar with `.d.ts` files, I strongly recommend trying to use the tool [dts-gen](https://github.com/Microsoft/dts-gen) first.

package.json

@@ -64,6 +64,7 @@
     "@types/jest": "^21.1.8",
     "@types/jquery": "^3.2.17",
     "@types/lodash": "^4.14.91",
+    "@types/lusca": "^1.5.0",
     "@types/mongodb": "^2.2.17",
     "@types/mongoose": "^4.7.29",
     "@types/morgan": "^1.7.32",

src/types/lusca.d.ts

@@ -1,2 +0,0 @@
-export function xframe(type: string): any;
-export function xssProtection(enabled: boolean): any;