use require() instead of import in order to avoid TS3.1 JSON import bug

Author: Tatamo

src/cli/acc.ts

@@ -1,5 +1,7 @@
 import commander from "commander";
-import {version} from "../../package.json";
+// import {version} from "../../package.json";
+// work-around to avoid TS5505 error bug in TypeScript 3.1 https://github.com/Microsoft/TypeScript/issues/24715
+const {version} = require("../../package.json");
 import {AtCoder} from "../atcoder";
 import {OnlineJudge} from "../facade/oj";
 import {init} from "../project";