Add CompilerStatus type

Author: ooflorent

lib/MultiCompiler.js

@@ -13,6 +13,8 @@ const MultiWatching = require("./MultiWatching");
 
 /** @typedef {import("./Compiler")} Compiler */
 
+/** @typedef {number} CompilerStatus */
+
 const STATUS_PENDING = 0;
 const STATUS_DONE = 1;
 const STATUS_NEW = 2;
@@ -216,6 +218,8 @@ module.exports = class MultiCompiler {
 
 		const watchings = [];
 		const allStats = this.compilers.map(() => null);
+
+		/** @type {CompilerStatus[]} */
 		const compilerStatus = this.compilers.map(() => STATUS_PENDING);
 
 		if (this.validateDependencies(handler)) {