Types for "micro-events" package (#31718)

* Types for "micro-events" package

* Fix version of TS by travis error

types/micro-events/index.d.ts

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+// Type definitions for micro-events 1.0
+// Project: https://github.com/alexanderGugel/micro-events
+// Definitions by: Alexander Sychev <https://github.com/AlexanderSychev>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+// TypeScript Version: 2.4
+
+/** Event emitter class */
+declare class MicroEventEmitter {
+    /** Max listeners count */
+    maxListeners: number;
+    /** Attach listener */
+    on(type: string, handler: MicroEventEmitter.EventHandler): MicroEventEmitter;
+    /** Detach listener */
+    off(type: string, handler?: MicroEventEmitter.EventHandler): MicroEventEmitter;
+    /** Trigger event */
+    emit(type: string, ...arguments: any[]): MicroEventEmitter;
+}
+declare namespace MicroEventEmitter {
+    /** Event handler function signature */
+    type EventHandler = (...args: any[]) => any;
+}
+export = MicroEventEmitter;

types/micro-events/micro-events-tests.ts

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+import * as EventEmitter from "micro-events";
+
+const myEventEmitter = new EventEmitter();
+
+myEventEmitter.maxListeners; // $ExpectType number
+
+const listener = (first: string) => {};
+
+myEventEmitter.on('foo', listener); // $ExpectType MicroEventEmitter
+
+myEventEmitter.emit('foo', 'bar'); // $ExpectType MicroEventEmitter
+
+myEventEmitter.off('foo', listener); // $ExpectType MicroEventEmitter

types/micro-events/tsconfig.json

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+
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "micro-events-tests.ts"
+    ]
+}

types/micro-events/tslint.json

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+{
+    "extends": "dtslint/dt.json"
+}