Add definitions for gulp-watch (https://github.com/floatdrop/gulp-watch)

gulp-watch/gulp-watch-tests.ts

@@ -0,0 +1,19 @@
+/// <reference path="gulp-watch.d.ts" />
+/// <reference path="../gulp/gulp.d.ts" />
+
+import gulp = require('gulp');
+import watch = require('gulp-watch');
+
+gulp.task('stream', () =>
+    gulp.src('css/**/*.css')
+        .pipe(watch('css/**/*.css'))
+        .pipe(gulp.dest('build'))
+);
+
+gulp.task('callback', (cb) =>
+    watch('css/**/*.css', () =>
+        gulp.src('css/**/*.css')
+            .pipe(watch('css/**/*.css'))
+            .on('end', cb)
+    )
+);

gulp-watch/gulp-watch.d.ts

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+// Type definitions for gulp-watch v4.1.1
+// Project: https://github.com/floatdrop/gulp-watch
+// Definitions by: Tanguy Krotoff <https://github.com/tkrotoff>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../node/node.d.ts" />
+
+declare module 'gulp-watch' {
+    interface IOptions {
+        ignoreInitial?: boolean;
+        events?: Array<string>;
+        base?: string;
+        name?: string;
+        verbose?: boolean;
+        readDelay?: number;
+    }
+
+    interface IWatchStream extends NodeJS.ReadWriteStream {
+        add(path: string | Array<string>): NodeJS.ReadWriteStream;
+        unwatch(path: string | Array<string>): NodeJS.ReadWriteStream;
+        close(): NodeJS.ReadWriteStream;
+    }
+
+    function watch(glob: string, options?: IOptions, callback?: Function): IWatchStream;
+
+    export = watch;
+}