release v4.0.1

Author: JamesMessinger

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@apidevtools/swagger-express-middleware",
-  "version": "4.0.0",
+  "version": "4.0.1",
   "description": "Swagger middleware and mocks for Express",
   "keywords": [
     "express",

package.json

@@ -548,8 +548,7 @@ describe("JSON Schema sample data", () => {
       });
       for (let i = 0; i < iterations; i++) {
         let obj = schema.sample();
-        expect(obj).to.be.an("object");
-        expect(obj).to.have.lengthOf(0);
+        expect(obj).to.be.an("object").and.empty;  // eslint-disable-line no-unused-expressions
       }
     });
   });