refactor: update dependencies

test/validate.spec.ts

@@ -53,7 +53,7 @@ export class ValidateSpec {
   }
 
   static after() {
-    rimraf(tmpdir, (error: Error) => {
+    rimraf(tmpdir, error => {
       // tslint:disable-next-line: no-unused-expression
       expect(error, `Unable to remove temporary directory for tests at: ${tmpdir}`).to.be.null;
     });