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

src/renderer/components/icon/icon.tsx

@@ -24,7 +24,7 @@ import "./icon.scss";
 import React, { ReactNode } from "react";
 import { findDOMNode } from "react-dom";
 import { NavLink } from "react-router-dom";
-import { LocationDescriptor } from "history";
+import type { LocationDescriptor } from "history";
 import { autobind, cssNames } from "../../utils";
 import { TooltipDecoratorProps, withTooltip } from "../tooltip";
 import isNumber from "lodash/isNumber";