Porting tests over to vitest

src/file/content-types/content-types.spec.ts

@@ -1,6 +1,6 @@
 // tslint:disable:no-string-literal
 
-import { expect } from "chai";
+import { beforeEach, describe, expect, it } from "vitest";
 
 import { Formatter } from "@export/formatter";