Turn on noUnusedLocals, noImplicitReturns, importsNotUsedAsValues: error, and isolatedModules (#2777)

integration/helpers/minikube.ts

@@ -19,7 +19,7 @@
  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 import { spawnSync } from "child_process";
-import { Application } from "spectron";
+import type { Application } from "spectron";
 
 export function minikubeReady(testNamespace: string): boolean {
   // determine if minikube is running