compile for both ESM and UMD

package.json

@@ -1,16 +1,27 @@
 {
+	"$schema": "https://json.schemastore.org/package.json",
 	"name": "@freezystem/mjml-bar-chart",
 	"repository": {
 		"type": "git",
 		"url": "https://github.com/Freezystem/mjml-bar-chart.git"
 	},
 	"version": "1.1.1",
 	"description": "A simple MJML component to make static bar charts",
-	"source": "src/index.ts",
+	"main":  "./build/umd/index.js",
+	"module":  "./build/esm/index.js",
+	"types":  "./build/types/index.d.ts",
+	"exports": {
+		".": {
+			"types": "./build/types/index.d.ts",
+			"require": "./build/umd/index.js",
+			"import": "./build/esm/index.js",
+			"default": "./build/umd/index.js"
+		}
+	},
 	"scripts": {
 		"watch": "tsc --watch",
 		"prebuild": "rm -rf build",
-		"build": "tsc",
+		"build": "tsc -b tsconfig.umd.json tsconfig.esm.json tsconfig.types.json",
 		"postinstall": "npm run build",
 		"test": "jest",
 		"deps": "npm-check -u",
@@ -30,6 +41,7 @@
 		"@types/mjml": "^4.7.4",
 		"@types/mjml-core": "^4.7.4",
 		"@types/mjml-validator": "^4.13.4",
+		"@types/node": "^20.10.2",
 		"jest": "^29.7.0",
 		"npm-check": "^6.0.1",
 		"prettier": "^3.1.0",

tsconfig.esm.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "build/esm",
+    "module": "ESNext"
+  }
+}

tsconfig.json

@@ -1,15 +1,16 @@
 {
 	"$schema": "https://json.schemastore.org/tsconfig",
-	"display": "Node 20",
 	"compilerOptions": {
-		"types": ["node", "jest", "mjml"],
-		"outDir": "build",
-		"target": "ES2022",
+		"rootDir": "src",
+		"types": ["node", "jest", "mjml", "mjml-core", "mjml-validator"],
+		"target": "ESNext",
 		"moduleResolution": "node",
+		"esModuleInterop": true,
 		"inlineSourceMap": true,
 		"alwaysStrict": true,
-		"esModuleInterop": true,
-		"skipLibCheck": true
+		"skipLibCheck": true,
+		"forceConsistentCasingInFileNames": true,
 	},
-	"include": ["src/index.ts"]
+	"include": ["src/**/*.ts"],
+	"exclude": ["node_modules", "dist", "build", "coverage", "src/**/*.spec.ts"]
 }

tsconfig.types.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "build/types",
+    "declaration": true,
+    "emitDeclarationOnly": true
+  }
+}

tsconfig.umd.json

@@ -0,0 +1,7 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "build/umd",
+    "module": "commonjs"
+  }
+}