build: add support for EcmaScript, CommonJs and UMD #125

Replace gulp by microbuild for building

Author: GillianPerard

.npmignore

@@ -0,0 +1,4 @@
+*
+!dist/**/*
+!README.md
+!LICENSE

gulpfile.js

@@ -2,10 +2,14 @@
     "name": "typescript-json-serializer",
     "version": "3.1.0",
     "description": "Typescript library to serialize classes into json and deserialize json into classes.",
-    "main": "index.js",
-    "types": "index.d.ts",
+    "source": "src/index.ts",
+    "main": "dist/index.js",
+    "exports": "./dist/index.modern.js",
+    "module": "dist/index.module.js",
+    "unpkg": "dist/index.umd.js",
+    "types": "dist/index.d.ts",
     "scripts": {
-        "build": "gulp build",
+        "build": "microbundle",
         "cover": "jest --coverage",
         "format": "pretty-quick",
         "format:staged": "pretty-quick --staged",
@@ -40,13 +44,10 @@
         "@commitlint/config-conventional": "^11.0.0",
         "@types/jest": "^26.0.20",
         "@types/node": "^14.14.22",
-        "del": "^6.0.0",
-        "gulp": "^4.0.2",
-        "gulp-copy": "^4.0.1",
-        "gulp-typescript": "^5.0.1",
         "husky": "^4.3.8",
         "jest": "^26.6.3",
         "jest-junit": "^12.0.0",
+        "microbundle": "^0.13.0",
         "prettier": "^2.2.1",
         "pretty-quick": "^3.1.0",
         "ts-jest": "^26.4.4",