package.json: explicitly set the files to install.

No need for an extra .npmignore file

Author: XhmikosR

.npmignore

@@ -7,6 +7,13 @@
   "author": "Jonas Kello",
   "license": "MIT",
   "repository": "https://github.com/dividab/tsconfig-paths",
+  "files": [
+    "/src/**/*.{js,ts}",
+    "/lib/**/*.{js,ts}",
+    "register.js",
+    "CHANGELOG.md",
+    "!**/__tests__/**"
+  ],
   "engines": {
     "node": ">=6"
   },