Add gulp-batch declaration files (#14832)

gulp-batch/gulp-batch-tests.ts

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+import * as gulp from "gulp";
+import * as batch from "gulp-batch";
+
+gulp.task('default', function() {
+    gulp.watch([ 'lib/**', 'test/**' ], batch((events: any, cb: any) => {
+        events.on('data', console.log).on('end', cb);
+     }));
+});

gulp-batch/index.d.ts

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+// Type definitions for gulp-batch 1.0
+// Project: https://github.com/floatdrop/gulp-batch
+// Definitions by: Alvaro Menezes <https://github.com/alvarollmenezes>, Vinicius Salomao <https://github.com/vizeke>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare function batch(opts?: any, cb?: any, errorHandler?: any): (event: any) => void;
+declare namespace batch { }
+export = batch;

gulp-batch/tsconfig.json

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

gulp-batch/tslint.json

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+{ "extends": "../tslint.json" }