Use export without a module declaration

See https://github.com/Microsoft/dtslint/blob/master/docs/no-declare-current-package.md

types/fingerprintjs2/index.d.ts

@@ -42,6 +42,4 @@ interface Fingerprint2Options {
     excludeHardwareConcurrency?: boolean;
 }
 
-declare module "fingerprintjs2" {
-    export = Fingerprint2;
-}
+export = Fingerprint2;