Generating source maps for ES5 distribution

Author: spong

package.json

@@ -13,7 +13,7 @@
   ],
   "scripts": {
     "build": "rimraf dist/ && tsc -p tsconfig.cjs.json && tsc -p tsconfig.esm.json && npm run build-web",
-    "build-web": "BABEL_ENV=web babel dist/esm --config-file=./babel.config.js --out-dir=dist/web",
+    "build-web": "BABEL_ENV=web babel dist/esm --config-file=./babel.config.js --out-dir=dist/web --source-maps=true",
     "pretest": "npm run build",
     "test": "echo \"It built ok, that'll do for now\"",
     "prepack": "npm run build",