add another files for project

.vscode/settings.json

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+{
+    "typescript.tsdk": "node_modules/typescript/lib"
+}

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
+and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]

gulpfile.js

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+const gulp = require('gulp');
+const ts = require('gulp-typescript');
+
+const package = ts.createProject('tsconfig.json');
+const distId = process.argv.indexOf('--dist');
+const packageName = 'nest-emitter';
+const dist = distId < 0 ? `node_modules/${packageName}` : process.argv[distId + 1];
+
+gulp.task('build', () => {
+  return package
+    .src()
+    .pipe(package())
+    .pipe(gulp.dest(dist));
+});
+
+gulp.task('move', function() {
+  gulp
+    .src([`node_modules/${packageName}/**/*`])
+    .pipe(gulp.dest(`example/node_modules/${packageName}`));
+});

jest.json

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+{
+    "moduleFileExtensions": [
+        "ts",
+        "tsx",
+        "js",
+        "json"
+    ],
+    "transform": {
+        "^.+\\.tsx?$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
+    },
+    "testRegex": "/src/.*\\.(test|spec).(ts|tsx|js)$",
+    "mapCoverage": true,
+    "collectCoverageFrom": [
+        "src/**/*.ts",
+        "!src/main.ts",
+        "!src/app/constants.ts",
+        "!src/**/index.ts",
+        "!src/**/*.module.ts",
+        "!src/**/*.interface.ts",
+        "!src/**/*.enum.ts",
+        "!**/node_modules/**",
+        "!**/vendor/**"
+    ],
+    "coverageReporters": [
+        "json",
+        "lcov"
+    ]
+}