add use strict to all scripts

Author: simonkoeck

src/executor.ts

@@ -1,3 +1,5 @@
+"use strict";
+
 import { platform, tmpdir } from "os";
 import { writeFileSync, unlinkSync, mkdirSync, readFileSync } from "fs";
 import { exec } from "child_process";

src/index.ts

@@ -1,3 +1,5 @@
+"use strict";
+
 import executer from "./executor";
 import l from "./languages";
 import lxc from "./lxc";

src/languages.ts

@@ -1,3 +1,5 @@
+"use strict";
+
 enum Language {
   PYTHON3 = "python3",
   C = "gcc",

src/lxc.ts

@@ -1,3 +1,5 @@
+"use strict";
+
 import { exec } from "child_process";
 import { mkdirSync, writeFileSync, readFileSync, chmodSync } from "fs";
 import { platform } from "os";