add source file to be published

package.json

@@ -9,7 +9,8 @@
     "url": "ssh://git@git.mightyplow.net:30022/mightyplow/flags.git"
   },
   "files": [
-    "dist"
+    "dist",
+    "src"
   ],
   "scripts": {
     "compile": "tsc ./src/flags.ts -d -t ESNext --strict --pretty --outDir ./dist/es6",