add support for bundling both esm and cjs versions

package.json

@@ -2,11 +2,22 @@
   "name": "@jwetzell/posistagenet",
   "version": "1.0.0",
   "description": "",
-  "main": "dist/index.js",
-  "types": "dist/index.d.ts",
+  "main": "./dist/cjs/index.js",
+  "module": "./dist/esm/index.js",
+  "types": "./dist/types/index.d.ts",
+  "exports": {
+    ".": {
+      "import": "./dist/esm/index.js",
+      "require": "./dist/cjs/index.js",
+      "types": "./dist/types/index.d.ts"
+    }
+  },
   "scripts": {
     "prebuild": "rimraf dist",
-    "build": "tsc",
+    "build": "npm run build:cjs && npm run build:esm && npm run build:types",
+    "build:cjs":"tsc -p tsconfig.cjs.json",
+    "build:esm":"tsc -p tsconfig.esm.json",
+    "build:types":"tsc -p tsconfig.types.json",
     "example:client": "node examples/psn_client.js",
     "example:server": "node examples/psn_server.js",
     "prepublishOnly": "npm run build"

tsconfig.cjs.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "CommonJS",
+    "declaration": false,
+    "outDir": "./dist/cjs"
+  }
+}

tsconfig.esm.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "module": "ESNext",
+    "declaration": false,
+    "outDir": "./dist/esm"
+  }
+}

tsconfig.json

@@ -1,12 +1,12 @@
 {
   "compilerOptions": {
+    "moduleResolution": "Node",
+    "lib": ["ESNext"],
+    "target": "ESNext",
     "esModuleInterop": true,
-    "module": "commonjs",
-    "target": "ES2020",
-    "declaration": true,
-    "rootDir": "./src",
-    "strict": true,
-    "outDir": "dist"
+    "isolatedModules": true,
+    "rootDir": "src/",
+    "strict": true
   },
-  "exclude": ["node_modules", "dist", "examples"]
+  "include": ["src/"]
 }

tsconfig.types.json

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