Update tsconfig to use CommonJS module (#34)

Author: nflaig

package.json

@@ -1,13 +1,15 @@
 {
   "name": "joi-password-complexity",
-  "version": "5.0.1",
+  "version": "5.0.2",
   "description": "Joi validation for password complexity requirements.",
   "main": "lib/index.js",
+  "types": "lib/index.d.ts",
   "scripts": {
     "test": "jest",
     "lint": "eslint src --ext .js,.ts",
     "lint-fix": "yarn lint --fix",
-    "build": "tsc -p tsconfig.json"
+    "build": "tsc -p tsconfig.json",
+    "prepublishOnly": "yarn build"
   },
   "repository": {
     "type": "git",
@@ -37,6 +39,9 @@
     "joi": "^17.3.0",
     "typescript": "^4.0.5"
   },
+  "files": [
+    "lib"
+  ],
   "keywords": [
     "Joi",
     "validation",

tsconfig.json

@@ -9,7 +9,7 @@
     "allowSyntheticDefaultImports": true,
     "strict": true,
     "forceConsistentCasingInFileNames": true,
-    "module": "esnext",
+    "module": "CommonJS",
     "moduleResolution": "node",
     "resolveJsonModule": true,
     "isolatedModules": true,